CX81801-84 Conexant Systems, Inc., CX81801-84 Datasheet
CX81801-84
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CX81801-84 Summary of contents
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... Data/Fax Modes.......................................................................................................................... 1-6 1.4.3.2 V.44 Data Compression.............................................................................................................. 1-7 1.4.3.3 Worldwide Operation.................................................................................................................. 1-7 1.4.3.4 TAM Mode.................................................................................................................................. 1-8 1.4.3.5 Speakerphone Mode (S Models)................................................................................................ 1-9 1.4.4 Reference Designs.......................................................................................................................................... 1-9 1.5 Hardware Description ..................................................................................................................................................... 1-9 1.5.1 CX81801 Modem Device ................................................................................................................................ 1-9 1.5.2 Digital Isolation Barrier................................................................................................................................. 1-10 1.5.3 CX20493 SmartDAA Line Side Device.......................................................................................................... 1-10 1.5.4 CX20442 Voice Codec .................................................................................................................................. 1-10 1.6 AT Commands .............................................................................................................................................................. 1-10 2. Technical Specifications .......................................................................................................................2-1 2.1 Serial DTE Interface Operation........................................................................................................................................ 2-1 2.1.1 Automatic Speed/Format Sensing .................................................................................................................. 2-1 2.2 Parallel Host Bus Interface Operation............................................................................................................................. 2-2 2 ...
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... Worldwide Country Support ......................................................................................................................................... 2-10 2.15 Diagnostics ................................................................................................................................................................... 2-11 2.15.1 Commanded Tests........................................................................................................................................ 2-11 2.15.2 Power On Reset Tests .................................................................................................................................. 2-11 2.16 Low Power Sleep Mode ................................................................................................................................................ 2-12 3. Hardware Interface ...............................................................................................................................3-1 3.1 CX81801 Modem Hardware Pins and Signals ................................................................................................................ 3-1 3.1.1 Common to Parallel and Serial Interface Configurations................................................................................ 3-1 3.1.1.1 LSD Interface (Through DIB)...................................................................................................... 3-1 3.1.1.2 Call Progress Speaker Interface ................................................................................................. 3-1 3.1.1.3 Voice Relay Interface (S Models) ............................................................................................... 3-1 3.1.1.4 Serial EEPROM Interface............................................................................................................ 3-1 3 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 3.1.2 Serial Interface Configuration Only................................................................................................................. 3-2 3.1.2.1 Serial DTE Interface and Indicator Outputs (PARIF = Low)........................................................ 3-2 3.1.3 Parallel Interface Configuration Only (PARIF = High)..................................................................................... 3-3 3.1.3.1 Parallel Host Bus Interface ......................................................................................................... 3-3 3.1.4 CX81801 Modem Interface Signals................................................................................................................ 3-3 3.2 CX20493 LSD Hardware Pins and Signals ................................................................................................................... 3-22 3.2.1 CX20493 LSD Signal Summary.................................................................................................................... 3-22 3 ...
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... Figure 2-1. TMIND# Test Results Pulse Cycles ................................................................................................................ 2-12 Figure 3-1. CX81801 Modem Hardware Signals for Parallel Interface (PARIF = High) ...................................................... 3-4 Figure 3-2. CX81801 Modem 128-Pin TQFP Pin Signals for Parallel Interface (PARIF = High) ......................................... 3-5 Figure 3-3. CX81801 Modem Hardware Signals for Serial Interface (PARIF = Low)........................................................ 3-12 Figure 3-4. CX81801 Modem 128-Pin TQFP Pin Signals for Serial Interface (PARIF = Low)........................................... 3-13 Figure 3-5 ...
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... Table 3-1. CX81801 Modem 128-Pin TQFP Pin Signals for Parallel Interface (PARIF = High)........................................... 3-6 Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) ................................................. 3-8 Table 3-3. CX81801 Modem 128-Pin TQFP Pin Signals for Serial Interface (PARIF = Low) ............................................ 3-14 Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low)................................................... 3-16 Table 3-5 ...
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... MCU firmware from the host/DTE to the SmartV.XX modem. The SmartV.XX Modem device set consists of a CX81801 modem device in a 128-pin TQFP and a CX20493 SmartDAA Line Side Device (LSD 28-pin QFN. Conexant’s SmartDAA® technology eliminates the need for a costly analog transformer, relays and opto-isolations typically used in discrete DAA (Data Access Arrangement) implementations ...
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... Table 1-1. SmartV.XX Modem Models and Functions Model/Order/Part Numbers Marketing Name Device Set Order Modem Device No. [128-Pin TQFP] Part No. SmartV.92 DS56-L147-203 CX81801-74 SmartV.92/S DS56-L147-204 CX81801-74 SmartV.92/LF DS56-L147-206 CX81801-84 SmartV.34 DS28-L147-203 CX81801-72 SmartV.34/S DS28-L147-204 CX81801-72 SmartV.34/LF DS28-L147-206 CX81801-82 SmartV.32bis DS96-L147-203 CX81801-73 SmartV.32bis/S DS96-L147-204 CX81801-73 SmartV ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 1-1. SmartV.XX Modem Simplified Interface Diagram PARALLEL HOST BUS OR SERIAL DTE CX81801 INTERFACE Modem 128-Pin TQFP Figure 1-2. SmartV.XX Modem Major Interfaces CX81801 Modem 128-Pin TQFP SmartDAA Interface Paralle Host Microcontroller Modem Data or Serial DTE Unit (MCU) ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 1.3 Features 1.3.1 General Modem Features • Data modem − − − • Data compression and error correction − − − • Fax modem send and receive rates up to 14.4 kbps − − • V.80 synchronous access mode supports host-controlled communication protocols with H.324 interface support • ...
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... Parallel 16550A UART-compatible interface up to 230.4 kbps Serial ITU-T V.24 (EIA/TIA-232-E) logical interface up to 115.2 kbps CX81801 Modem device in 128-pin TQFP CX20493 LSD in 28-pin QFN CX20442 VC in 32-pin TQFP CX81801 and CX20493: 209 mW (Normal Mode (Sleep Mode) CX20442 (Normal Mode) Conexant 1-5 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 1.4 Technical Overview 1.4.1 General Description Modem operation, including dialing, call progress, telephone line interface, telephone handset interface, optional voice/speakerphone interface, and host interface functions are supported and controlled through the V.250, V.251, and V.253-compatible command set. The modem hardware connects to the host via a parallel or serial interface as selected by the PARIF input ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet speeds kbps. When PCM upstream is disabled, data transmission supports sending data at line speeds up to V.34 rates. This mode can fallback to V.34 mode and to lower rates as dictated by line conditions. The following modes are supported in V.92 models when connected to a V.92- compatible server supporting the feature listed. • ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 1-2. Default Countries Supported Country Australia Austria Belgium Brazil China Denmark Finland France Germany Hong Kong India Ireland Italy Japan Korea Malaysia Mexico Netherlands Norway Poland Portugal Singapore South Africa Spain Sweden Switzerland Taiwan United Kingdom ...
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... Modem Data Pump (MDP), 256 KB internal ROM internal RAM, and SmartDAA interface functions. The CX81801 Modem connects to host via a parallel host (PARIF = high logical V.24 (EIA/TIA-232-E) serial DTE interface (PARIF = low). The CX81801 Modem performs the command processing and host interface functions. ...
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... The CLK input is also accepted from the DIB transformer secondary winding through a capacitor and a resistor in series. Information is transferred between the LSD and the CX81801 through the DIB_P and DIB_N pins. These pins connect to the CX81801 DIB_DATAP and DIB_DATAN pins, respectively, through the DIB. ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Data Mode Operation. Data functions operate in response to the AT commands when +FCLASS=0. Default parameters support U.S./Canada operation. Fax Mode Operation. Facsimile functions operate in response to fax class 1 commands when +FCLASS fax class 1.0 commands when +FCLASS=1.0. Voice/Audio Operation. Voice/audio functions operate in response to voice/audio commands when +FCLASS=8 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 1-12 This page is intentionally blank. Conexant 102199B ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 2. Technical Specifications 2.1 Serial DTE Interface Operation 2.1.1 Automatic Speed/Format Sensing Command Mode and Data Mode. The modem can automatically determine the speed and format of the data sent from the DTE. The modem can sense speeds of 300, 600, ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 2.2 Parallel Host Bus Interface Operation Command Mode and Data Mode. The modem can operate at rates up to 230.4 kbps by programming the Divisor Latch in the parallel interface registers if supported by communications software and/or driver. Fax Mode. In V.17 mode, the modem can operate at rates up to 230.4 kbps by programming the Divisor Latch in the parallel interface registers if supported by communications software and/or driver ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 2.3.7 Billing Protection When the modem goes off-hook to answer an incoming call, both transmission and reception of data are prevented for 2 seconds (data modem seconds (fax adaptive answer) to allow transmission of the billing tone signal. 2.3.8 Connection Speeds The modem functions as a data modem when the +FCLASS=0 command is active. ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 2.4 Data Mode The modem enters data mode when a telephone line connection has been established between modems and all handshaking has been completed. 2.4.1 Speed Buffering (Normal Mode) Speed buffering allows a DTE to send data to, and receive data from, a modem at a speed different than the line speed ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 2.4.7 Retrain The modem may lose synchronization with the received line signal under poor or changing line conditions. If this occurs, retraining may be initiated to attempt recovery depending on the type of connection. The modem initiates a retrain if line quality becomes unacceptable if enabled by the %E command ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 2.5.2 Quick Connect The quick connect function enables the modem to shorten the connect time of subsequent calls to a server supporting quick connect. The quick connect feature is supported by the +PQC command. 2.5.3 PCM Upstream PCM upstream boosts the upstream data rates between the user and ISP to reduce upload times for large files and email attachments ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 2.6.5 MNP 5 Data Compression MNP 5 data compression mode, enabled by the %Cn command, operates during an MNP connection. In MNP 5, the modem increases its throughput by compressing data into tokens before transmitting it to the remote modem, and by decompressing encoded received data before sending it to the DTE ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 2.7.3 Remote Hangup Detection The Remote Hangup Detection feature will cause the modem to go back on-hook and respond with the message “LINE REVERSAL DETECTED” during a data connection when the remote modem is disconnected for abnormal termination reasons (remote phone line unplugged, remote server/modem shutdown) ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Received analog mono audio samples are converted to digital form and formatted into 8- bit unsigned linear PCM format for reading by the host. AT commands control the bit length and sampling rate. Concurrent DTMF/tone detection is available at the 8 kHz sample rate. ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 2.12 Full-Duplex Speakerphone (FDSP) Mode (S Models) The modem operates in FDSP mode when +FCLASS=8 and +VSP=1 (Section 2.10.7). In FDSP Mode, speech from a microphone or handset is converted to digital form, shaped, and output to the telephone line through the line interface circuit. Speech received from the telephone line is shaped, converted to analog form, and output to the speaker or handset ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet • Blacklist parameters. The modem can operate in accordance with requirements of individual countries to prevent misuse of the network by limiting repeated calls to the same number when previous call attempts have failed. Call failure can be detected for reasons such as no dial tone, number busy, no answer, no ringback detected, voice (rather than modem) detected, and key abort (dial attempt aborted by user) ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 2-1. TMIND# Test Results Pulse Cycles Internal RAM Fails Pulse Cycle 0 Modem Device Fails 0 2.16 Low Power Sleep Mode Sleep Mode Entry. The modem enters the low power sleep mode when no line connection exists and no host activity occurs for the period of time specified in the S24 register ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 3. Hardware Interface 3.1 CX81801 Modem Hardware Pins and Signals 3.1.1 Common to Parallel and Serial Interface Configurations 3.1.1.1 LSD Interface (Through DIB) The DIB interface signals are: • Clock and Power Positive (PWRCLKP); output • Clock and Power Negative (PWRCLKN); output • ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 3.1.1.5 External Bus Interface The external bus optionally connects to OEM-supplied external memory: • (512K x 8) ROM/flash ROM • (128K x 8) RAM The non-multiplexed external bus interface signals are: • Eight bidirectional Data lines (D0-D7) • ...
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... CX81801 Modem 128-pin TQFP hardware interface signals for serial interface are shown by major interface in Figure 3-3, are shown by pin number in Figure 3-4, and are listed by pin number in Table 3-3. CX81801 Modem hardware interface signals for serial interface are defined in Table 3-4. I/O types are defined in Table 3-5. ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 3-1. CX81801 Modem Hardware Signals for Parallel Interface (PARIF = High) 114 CRYSTAL XTLI 115 CIRCUIT XTLO 113 CLKIN 61 NC CLKOUT 49 NC XCLK 111 NC DV1TP 240K 57 +3.3V LPO 47 NOXYCK 5 PARIF STPMODE# (PD3) 117 +3.3V NMI# 34 RESET# 11 HCS# (PD4) ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 3-2. CX81801 Modem 128-Pin TQFP Pin Signals for Parallel Interface (PARIF = High) 102199B CX81801 Parallel Interface (PARIF Pin = High) Conexant 102199_004 3-5 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-1. CX81801 Modem 128-Pin TQFP Pin Signals for Parallel Interface (PARIF = High) Pin Signal Label I/O I/O Type 1 HD5 (PC5) I/O Ith/Ot8 2 VDD P PWR 3 HD6 (PC6) I/O Ith/Ot8 4 HD7 (PC7) I/O Ith/Ot8 5 PARIF I Itpu 6 HA0 (PD0) I Ithpd/Ot2 7 HA1 (PD1) I Ithpd/Ot2 8 HA2 (PD2) ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-1. CX81801 Modem 128-Pin TQFP Pin Signals for Parallel Interface (PARIF = High) (Continued) Pin Signal Label I/O I/O Type 47 NOXYCK I Itpu 48 GND G GND 49 XCLK O It/Ot2 50 IASLEEP (P_PF05) O Ot2 51 RESERVED I/O Itpu/Ot2 (P_PB01) 52 RESERVED (GP00) I/O It/Ot2 53 VDD_CORE P PWR 54 RESERVED I/O Itpu/Ot2 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) Label Pin XTLI, 114, XTLO 115 CLKIN 113 CLKOUT 61 DV1TP 111 PARIF 5 LINE_SEL (PE7) 23 STPMODE# (PD3) 9 NMI# 117 RESET# 34 VGG 60 VDD 2, 15, 40, 58, 78, 100, 108, ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) (Continued) Label Pin DSPKOUT 98 PWRCLKP 96 PWRCLKN 97 DIB_DATAP 93 DIB_DATAN 94 A0-A9, 71-77, 79-81, A10-A15, 84, 86-89, 91, A16 (PB0), 99, A17 (PB4), 105, A18 (PB5) 106 D0-D7 62-67, 69-70 READ# 119 WRITE# 118 ROMSEL# (PB2) 102 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) (Continued) Label Pin HCS# (PD4) 11 HWT# (PD5) 12 HRD# (PD6) 13 HINT (PB7) 109 HA0-HA2 6-8 (PD0-PD2) HD0-HD7 122-123, 125- (PC0-PC7) 127, 1, 3-4 3-10 I/O I/O Type Parallel Host Interface I It Host Bus Chip Select. HCS# input low enables the MCU host bus interface ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-2. CX81801 Modem Pin Signal Definitions for Parallel Interface (PARIF = High) (Continued) Label Pin VOICE# (PE1) 16 HS_LCS (PE4) 19 TESTP 110 XCLK 49 PHS2 121 SR4RIN 45 PA2 27 PA6 32 PD7 46 P_PX00 41 P_PX02 42 P_PX03 43 RESERVED (PA0) 24 RESERVED (PA1) 26 RESERVED (PA3) ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 3-3. CX81801 Modem Hardware Signals for Serial Interface (PARIF = Low) 114 CRYSTAL XTLI 115 CIRCUIT XTLO 113 CLKIN 61 NC CLKOUT 49 NC XCLK 111 NC DV1TP 240K 57 +3.3V LPO 47 NOXYCK 5 PARIF 9 NC STPMODE# (PD3) 117 +3.3V NMI# 34 RESET CIRCUIT RESET# ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 3-4. CX81801 Modem 128-Pin TQFP Pin Signals for Serial Interface (PARIF = Low) 102199B CX81801 Serial Interface (PARIF Pin = Low) Conexant 102199_006 3-13 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-3. CX81801 Modem 128-Pin TQFP Pin Signals for Serial Interface (PARIF = Low) Pin Signal Label I/O I/O Type 1 RI# (PC5) O Ith/Ot8 2 VDD P PWR 3 TM# (PC6) O Ith/Ot8 4 RESERVED (PC7) I Ith/Ot8 5 PARIF I Itpu 6 DTRIND# (PD0) O Ithpd/Ot2 7 PD1 I/O Ithpd/Ot2 8 PD2 I/O Ithpd/Ot2 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-3. CX81801 Modem 128-Pin TQFP Pin Signals for Serial Interface (PARIF = Low) (Continued) Pin Signal Label I/O I/O Type 47 NOXYCK I Itpu 48 GND G GND 49 XCLK O It/Ot2 50 IASLEEP (P_PF05) O Ot2 51 RXCLK# (P_PB01) O Itpu/Ot2 52 XTCLK# (GP00) I It/Ot2 53 VDD_CORE P PWR 54 TXCLK# (P_PA04) ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low) Label Pin XTLI, 114, XTLO 115 CLKIN 113 CLKOUT 61 DV1TP 111 PARIF 5 LINE_SEL (PE7) 23 STPMODE# (PD3) 9 NMI# 117 RESET# 34 VGG 60 VDD 2, 15, 40, 58, 78, 100, 108, ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low) (Continued) Label Pin DSPKOUT 98 PWRCLKP 96 PWRCLKN 97 DIB_DATAP 93 DIB_DATAN 94 A0-A9, 71-77, 79-81, A10-A15, 84, 86-89, 91, A16 (PB0), 99, A17 (PB4), 105, A18 (PB5) 106 D0-D7 62-67, 69-70 READ# 119 WRITE# 118 ROMSEL# (PB2) 102 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low) (Continued) Label Pin TXD# (PA2) 27 RXD# (PA6) 32 CTS# (PC1) 123 DSR# (PC0) 122 RLSD# (PC2) 125 TM# (PC6) 3 RI# (PC5) 1 DTR# (PD4) 11 RTS# (PD6) 13 3-18 I/O I/O Type V.24 (EIA/TIA-232-E) DTE Serial Interface ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low) (Continued) Label Pin V.24 (EIA/TIA-232-E) DTE Serial Interface (Continued) RXCLK# (P_PB01) 51 TXCLK# (P_PA04) 54 XTCLK# (GP00) 52 AAIND# (PC4) 127 TMIND# (PB7) 109 DTRIND# (PD0) 6 OHIND# (PE0) 14 102199B ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-4. CX81801 Modem Pin Signal Definitions for Serial Interface (PARIF = Low) (Continued) Label Pin VOICE# (PE1) 16 HS_LCS (PE4) 19 TESTP 110 XCLK 49 S4RIN 45 PHS2 121 PC3 126 PD1 7 PD2 8 PD7 46 P_PX00 41 P_PX02 42 P_PX03 43 RESERVED (PA0) 24 RESERVED (PA1) ...
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... GND Ground NOTES: 1. See DC characteristics in Table 3-6. 2. I/O Type corresponds to the device Pad Type. The I/O column in signal interface tables refers to signal I/O direction used in the application. Table 3-6. CX81801 Modem DC Electrical Characteristics Parameter Symbol Input Voltage Low VIL +5V tolerant +5V tolerant hysteresis Input Voltage High VIH ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 3.2 CX20493 LSD Hardware Pins and Signals 3.2.1 CX20493 LSD Signal Summary 3.2.1.1 Smart Modem Interface (Through DIB) The DIB interface, power, and ground signals are: • Clock (CLK, pin 26); input • Digital Power (PWR+, pin 7); unregulated input power • ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 3.2.1.4 General Purpose Input/Output There is one unassigned general purpose input/output pin: • General Purpose Input/Output 1 (GPIO1, pin 1); input/output 3.2.1.5 No Connects Three pins are not used: • No Connect 1 (NC1, pin 8); no internal connection • No Connect 2 (NC2, pin 22); no internal connection • ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 3-6. CX20493 LSD 28-Pin QFN Pin Signals Table 3-7. CX20493 LSD 28-Pin QFN Pin Signals Pin 3-24 CX20493 Signal Label GPIO1 15 AVdd VRef 18 RBias 19 AGnd 20 PWR+ 21 NC1 22 RXI EIC ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-8. CX20493 LSD Hardware Signal Definitions Label Pin I/O AVdd 2 PWR AGnd 6 AGND_LSD VRef 4 REF VRef 4 REF Vc 3 REF PWR+ 7 PWR DVdd 24 PWR DGnd 23 DGND_LSD PADDLE — AGND_LSD CLK 26 I DIB_P 27 I/O DIB_N 28 I/O 102199B I/O Type Signal Name/Description System Signals PWR Regulated Power Output ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-8. CX20493 LSD Hardware Signal Definitions (Continued) Label Pin I/O RAC1 21 I TAC1 20 I RAC2 19 I TAC2 18 I EIC 11 O TRDC 12 I EIO 17 O DC_GND 15 GND EIF 16 I RXI 9 I RBias TXO 14 O TXF 13 I GPIO1 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-9. CX20493 LSD GPIO DC Electrical Characteristics Parameter Input Voltage Input Voltage Low Input Voltage High Output Voltage Low Output Voltage High Input Leakage Current Output Leakage Current (High Impedance) GPIO Output Sink Current at 0.33 V maximum GPIO Output Source Current at 2.97 V minimum GPIO Rise Time/Fall Time Test Conditions unless otherwise stated: DVdd = +3.3V +5% ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 3.3 CX20442 VC Hardware Pins and Signals (S Models) 3.3.1 CX20442 VC Signal Summary Microphone and analog speaker interface signals, as well as telephone handset/headset interface signals are provided to support functions such as speakerphone mode, telephone emulation, microphone voice record, speaker voice playback, and call progress monitor. ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 3.3.2 CX20442 VC Pin Assignments and Signal Definitions VC 32-pin TQFP hardware interface signals are shown by major interface in Figure 3-7, are shown by pin number in Figure 3-8, and are listed by pin number in Table 3-11. VC hardware interface signals are defined in Table 3-12. VC pin signal DC electrical characteristics are defined in Table 3-13. ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 3-7. CX20442 VC Hardware Interface Signals 1 IASLEEP SLEEP 4 DRESET# POR 19 M_CLK M_CLKIN 21 V_SCLK M_SCK 23 CX81801 V_STROBE M_STROBE 20 V_TXSIN M_TXSIN 22 V_RXOUT M_RXOUT 18 V_CTRL M_CNTRLSIN 17 +3.3V VDD 25 VDD 5 VAA (+3.3V) MAVDD 28 VSS 26 SET3V_BAR2 GND 6 MAVSS 27 VSUB AGND Figure 3-8. CX20442 VC 32-Pin TQFP Pin Signals ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-11. CX20442 VC 32-Pin TQFP Pin Signals Pin Signal Label I/O 1 SLEEP I 2 M_DIG_SPEAKER O 3 M_SPKR_OUT O 4 POR I 5 MAVDD P 6 MAVSS M_LINE_OUTP O 10 M_LINE_OUTM O 11 VREF M_MIC_IN I 14 M_LINE_IN I 15 M_MIC_BIAS 16 M_RELAYB 17 VDD ...
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... Power-On Reset. Active low reset input. Connect to Host RESET# or reset circuit. I Itpu Set +3.3V Analog Reference. Connect to GND. CX81801 Interconnect I Itpd IA Sleep. Active high sleep input. Connect to CX81801 IASLEEP pin. I Itpd Master Clock Input. Connect to CX81801 M_CLK pin. O Ot2 Serial Clock Output. Connect to CX81801 V_SCLK pin. ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-15. CX20442 VC Pin Signal Definitions (Continued) Label Pin VREF M_DIG_SPEAKER 2 M_LINE_OUTM 10 M_RELAYA 24 M_RELAYB 16 M_MIC_BIAS 15 M_ACT90 29 M_1BIT_OUT 30 D_LPBK_BAR Notes: 1. I/O types*: Ia Analog input It Digital input, TTL-compatible Digital input, TTL-compatible, internal 75k ± 25k Ω pull-down Itpd Digital input, TTL-compatible, internal 75k ± ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 3-14. CX20442 VC Analog Electrical Characteristics Signal Name Type M_LINE_IN, I (DA) M_MIC_IN M_LINE_OUTP O (DD) M_SPKR_OUT O (DF) Test Conditions unless otherwise stated: VDD = +3.3 ± 0.3 VDC; MAVDD = +3.3 ± 0.3 VDC 0°C to 70°C Parameter DAC to Line Driver output (600Ω load, 3dB in SCF and CTF) SNR/SDR at: ...
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... Operating Conditions, Absolute Maximum Ratings, and Power Requirements The operating conditions are specified in Table 3-15. The absolute maximum ratings are listed in Table 3-16 for the CX81801, Table 3-17 for the CX20493, and Table 3-18 for the CX20442. The current and power requirements are listed in Error! Reference source not found.. ...
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... Latch-up Current (25 °C) Notes: 1. Ratings specified for +3.3 V operation. 2. Voltages referenced to ground (VSS). Table 3-19. Current and Power Requirements Mode CX81801 Modem and CX20493 LSD Normal Mode: Off-hook, normal data connection Normal Mode: On-hook, idle, waiting for ring Sleep Mode CX20442 VC (Optional) Normal Mode Notes: 1 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 3.4.2 Interface and Timing Waveforms 3.4.2.1 External Memory Bus Timing The external memory bus timing is listed in Table 3-20 and illustrated in Figure 3-9. Table 3-20. Timing - External Memory Bus Symbol Parameter t Internal Operating Frequency FI t Internal Operating Clock Cycle CYC t READ# High to Address Valid ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 3-9. Waveforms - External Memory Bus C2* A[18:0] ES#** READ# D[7: Internal Phase 2 clock. ** ES# = RAMSEL# or ROMSEL#. C2* A[18:0] ES#** WRITE# D[7: Internal Phase 2 clock. ** ES# = RAMSEL# or ROMSEL#. 3-38 t CYC RDS Read Timing t CYC WTD Write Timing Conexant t RDH t WTH ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 3.4.2.2 Parallel Host Bus Timing The parallel host bus timing is listed in Table 3-21 and illustrated in Figure 3-10. Table 3-21. Timing - Parallel Host Bus Symbol Parameter t Address Setup AS t Address Hold AH t Chip Select Setup CS t Chip Select Hold CH t HRD# Strobe Width ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 3-10. Waveforms - Parallel Host Bus HA[2-0] HCS# HRD# HWT# HD[7-0] HA[2-0] HCS# HRD# HWT# HD[7-0] 3- DRH a. Host Read DWH Host Write Conexant 100491 F3-10 WF-HB 102199B ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 3.4.2.3 Serial DTE Interface The serial DTE interface waveforms for 4800 and 9600 bps are illustrated in Figure 3-11. Figure 3-11. Waveforms - Serial DTE Interface TXCLK 4800 BPS TXD 4800 BPS TXCLK 9600 BPS TXD 9600 BPS NOTE: THIS FIGURE IS VALID FOR SYNCHRONOUS MODE ONLY. THERE IS NO RELATIONSHIP BETWEEN NOTE: TXD AND TXCLK IN ASYNCHRONOUS MODE ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 3.5 Crystal Specifications Crystal specifications are listed in Table 3-22. Table 3-22. Crystal Specifications Frequency Calibration Tolerance Frequency Stability vs. Temperature Frequency Stability vs. Aging Oscillation Mode Calibration Mode Load Capacitance, C Shunt Capacitance, C Series Resistance, R Drive Level Operating Temperature Storage Temperature 3-42 Characteristic 28.224 MHz nominal ± ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 102199B This page is intentionally blank. Conexant 3-43 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 4. Package Dimensions The 128-pin TQFP package dimensions are shown in Figure 4-1. The 32-pin TQFP package dimensions are shown in Figure 4-2. The 28-pin QFN package dimensions are shown in Figure 4-3. 102199B Conexant 4-1 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 4-1. Package Dimensions - 128-Pin TQFP PIN 1 REF DETAIL A 4 DETAIL Coplanarity Ref: 128-PIN TQFP (GP00-D264 Metric values (millimeters) should be used for PCB layout. English values (inches) are ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 4-2. Package Dimensions - 32-pin TQFP PIN 1 REF DETAIL A 102199B D1 DETAIL A Dim. Min 0. 8. 0.30 c 0.13 Coplanarity Ref: 32-PIN TQFP (GP00-D262 Metric values (millimeters) should be used for PCB layout. English values (inches) are ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Figure 4-3. Package Dimensions - 28-Pin QFN Pin 1 Identifier 2 3 TOP VIEW TERMINAL TIP NOTES: 1. DIMENSION b APPLIES TO PLATED TERMINAL AND IS MEASURED BETWEEN 0.20 AND 0.25mm FROM TERMINAL TIP. 2. PACKAGE WARPAGE MAX 0.05mm. 3. APPLIED FOR EXPOSED PAD AND TERMINALS. EXCLUDE EMBEDDING PART OF EXPOSED PAD FROM MEASURING ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 5. Parallel Host Interface The modem supports a 16550A interface in parallel interface versions. The 16550A interface can operate in FIFO mode or non-FIFO mode. Non-FIFO mode is the same as 16450 interface operation. FIFO mode unique operations are identified. 5.1 Overview The parallel interface registers and the corresponding bit assignments are shown in Table 5-1 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Table 5-1. Parallel Interface Registers Register Register No. Name 7 Scratch Register (SCR) 6 Modem Status Register (MSR) Data Carrier 5 Line Status Register (LSR) RX FIFO 4 Modem Control Register (MCR) 3 Line Control Register (LCR) Divisor Latch Access Bit 2 Interrupt Identify Register (IIR) ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 5.2 Register Signal Definitions 5.2.1 IER - Interrupt Enable Register (Addr = 1, DLAB = 0) The IER enables five types of interrupts that can separately assert the HINT output signal (Table 5-2). A selected interrupt can be enabled by setting the corresponding enable bit disabled by setting the corresponding enable bit Disabling an interrupt in the IER prohibits setting the corresponding indication in the IIR and assertion of HINT ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 5.2.2 FCR - FIFO Control Register (Addr = 2, Write Only) The FCR is a write-only register used to enable FIFO mode, clear the RX FIFO and TX FIFO, enable DMA mode, and set the RX FIFO trigger level. Bits 7-6 FCR7 and FCR6 set the trigger level for the RX FIFO (Receiver Data Available) interrupt ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 5.2.3 IIR - Interrupt Identifier Register (Addr = 2) The Interrupt Identifier Register (IIR) identifies the existence and type five prioritized pending interrupts. Four priority levels are set to assist interrupt processing in the host. The four levels, in order of decreasing priority, are: Highest: Receiver Line Status, 2: Receiver Data Available or Receiver Character Timeout Buffer Empty, and 4: Modem Status ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 5.2.4 LCR - Line Control Register (Addr = 3) The Line Control Register (LCR) specifies the format of the asynchronous data communications exchange. Bit 7 This bit must be set access the Divisor latch registers during a read or write operation. It must be reset access the Receiver Buffer, the Transmitter Buffer, or the Interrupt Enable Register ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 5.2.5 MCR - Modem Control Register (Addr = 4) The Modem Control Register (MCR) controls the interface with the modem or data set. Bit 7-5 Always 0. Bit 4 When this bit is set the diagnostic mode is selected and the following occurs: Data written to the Transmit Buffer is looped back to the Receiver Buffer. ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet Bit 5 This bit, when set, indicates that the TX Buffer is empty and the modem can accept a new character for transmission. In addition, this bit causes the modem to issue an interrupt to the host when the Transmit Holding Register Empty Interrupt Enable bit (IIR1) is set to 1 ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 5.2.7 MSR - Modem Status Register (Addr = 6) The Modem Status Register (MSR) reports current state and change information of the modem. Bits 4-7 supply current state and bits 0-3 supply change information. The change bits are set whenever a control input from the modem changes state from the last MSR read by the host ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 5.2.10 Divisor Registers (Addr = 0 and 1, DLAB = 1) The Divisor Latch LS (least significant byte) and Divisor Latch MS (most significant byte) are two read-write registers at locations 0 and 1 when DLAB = 1, respectively. The baud rate is selected by loading each divisor latch with the appropriate hex value. ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 5.3.2 Receiver Character Timeout Interrupts When the FIFO mode is enabled (FCR0 = 1) and receiver interrupt (Receiver Data Available) is enabled (IER0 = 1), receiver character timeout interrupt operation is as follows Receiver character timeout interrupt code (IIR0-IIR3 = Ch) is set if at least one ...
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... CX81801-7x/8x SmartV.XX Modem Data Sheet 5-12 This page is intentionally blank. Conexant 102199B ...
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NOTES ...
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