CX20493-21 Conexant Systems, Inc., CX20493-21 Datasheet

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CX20493-21

Manufacturer Part Number
CX20493-21
Description
Manufacturer
Conexant Systems, Inc.
Datasheet

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CX20493-21
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Doc. No. 102339C
March 3, 2004
CX84100-41/-23 SCXV.22bis Modem
V.22bis Modem with CX20493 SmartDAA
Line Side Device
Data Sheet

CX20493-21 Summary of contents

Page 1

... CX84100-41/-23 SCXV.22bis Modem V.22bis Modem with CX20493 SmartDAA Line Side Device Data Sheet Doc. No. 102339C March 3, 2004 ...

Page 2

... Conexant products for use in such applications their own risk and agree to fully indemnify Conexant for any damages resulting from such improper use or sale. The following are trademarks of Conexant Systems, Inc.: Conexant and the Conexant C symbol, and SmartDAA. Product names or services listed in this publication are for identification purposes only, and may be trademarks of third parties. Third-party brands and names are the property of their respective owners. For additional disclaimer information, please consult Conexant’ ...

Page 3

... Operating Modes ............................................................................................................................................ 1-5 1.3.3.1 Data Modes ................................................................................................................................ 1-5 1.3.3.2 Worldwide Operation.................................................................................................................. 1-5 1.3.4 Reference Design ........................................................................................................................................... 1-6 1.4 Hardware Description ..................................................................................................................................................... 1-7 1.4.1 CX84100 V.22bis Modem............................................................................................................................... 1-7 1.4.2 Digital Isolation Barrier................................................................................................................................... 1-7 1.4.3 CX20493 SmartDAA Line Side Device............................................................................................................ 1-7 1.5 Commands ..................................................................................................................................................................... 1-8 2. Technical Specifications .......................................................................................................................2-1 2.1 Serial DTE Interface Operation........................................................................................................................................ 2-1 2.1.1 Automatic Speed/Format Sensing .................................................................................................................. 2-1 2.2 Establishing Data Modem Connections .......................................................................................................................... 2-2 2.2.1 Dialing ............................................................................................................................................................ 2-2 2.2.2 Modem Handshaking Protocol ....................................................................................................................... 2-2 2.2.3 Call Progress Tone Detection ......................................................................................................................... 2-2 2 ...

Page 4

... CX84100 Interface (Through DIB)............................................................................................ 3-13 3.3.1.2 Telephone Line Interface .......................................................................................................... 3-13 3.3.1.3 Voltage References................................................................................................................... 3-13 3.3.1.4 General Purpose Input/Output.................................................................................................. 3-14 3.3.1.5 No Connects ............................................................................................................................. 3-14 3.3.2 CX20493 LSD 32-Pin LQFP Pin Assignments and Signal Definitions .......................................................... 3-14 3.4 CX20493 LSD GPIO DC Electrical Characteristics ........................................................................................................ 3-18 3.5 Electrical and Environmental Specifications ................................................................................................................. 3-19 3.5.1 Operating Conditions, Absolute Maximum Ratings, and Power Requirements ........................................... 3-19 3.6 Interface Timing and Waveforms.................................................................................................................................. 3-21 3.6.1.1 Serial DTE Interface ...

Page 5

... Figure 3-2. CX84100 V.22bis Modem 28-Pin TSSOP Pin Signals...................................................................................... 3-3 Figure 3-3. CX20493 LSD 28-Pin QFN Hardware Interface Signals.................................................................................... 3-9 Figure 3-4. CX20493 LSD 28-Pin QFN Pin Signals........................................................................................................... 3-10 Figure 3-5. CX20493 LSD 32-Pin LQFP Hardware Interface Signals................................................................................ 3-14 Figure 3-6. CX20493 LSD 32-Pin LQFP Pin Signals ......................................................................................................... 3-15 Figure 3-7. Waveforms - Serial DTE Interface .................................................................................................................. 3-21 Figure 4-1 ...

Page 6

... Table 3-5. CX20493 LSD 28-Pin QFN Pin Signals ............................................................................................................ 3-10 Table 3-6. CX20493 LSD 28-Pin QFN Signal Definitions .................................................................................................. 3-11 Table 3-7. CX20493 LSD 32-Pin LQFP Pin Signals .......................................................................................................... 3-15 Table 3-8. CX20493 LSD 32-Pin LQFP Pin Signal Definitions .......................................................................................... 3-16 Table 3-9. CX20493 LSD GPIO DC Electrical Characteristics ........................................................................................... 3-18 Table 3-10. CX20493 LSD AVdd DC Electrical Characteristics ......................................................................................... 3-18 Table 3-11 ...

Page 7

... The SCXV.22bis Modem device set, consisting of a CX84100 V.22bis Modem in a 28- pin TSSOP package and a CX20493 SmartDAA Line Side Device (LSD) in either a 28- pin Quad Flat No-lead (QFN) package or a 32-pin Low Profile Quad Pack (LQFP) package, supports data operation with hardware-based modem controller, digital signal processing, and DAA/telephone line interface functions ...

Page 8

... Line Isolation and Filter Side Components Barrier (DIB) DIB Codec Components Interface (LSDI) Conexant Line Side Device (LSD) [28-Pin QFN] Part No. CX20493-21 CX20493-31 Line Side Device (LSD) [38-Pin LQFP] Part No. CX20493-25 CX20493-35 Telephone Line Interface Discrete Components 102339_001 OEM Supplied Hardware ...

Page 9

CX84100-41/-23 SCXV.22bis Modem Data Sheet 1.2 Features • Modulations − − − − − − • Error correction and data compression − − − • Serial interface • Synchronous data mode − − − − − − • AT Command ...

Page 10

... Extension Pickup detection (option to automatically disconnect or inform the DTE) Remote Hang-up detection CX84100 V.22bis Modem in 28-pin TSSOP CX20493 Line Side Device in 28-pin QFN or 32-pin LQFP Single +3.3 V supply Low Power Mode Pin-compatible with Conexant SmartV.XX Modem (V.90+/V.34/V.32bis) in 28-pin CTLGA (see Doc. No. 102025) ...

Page 11

CX84100-41/-23 SCXV.22bis Modem Data Sheet 1.3 Technical Overview 1.3.1 General Description Modem operation, including dialing, call progress, telephone line interface, telephone handset interface, and host interface functions are supported and controlled through the AT command set. The modem hardware connects ...

Page 12

CX84100-41/-23 SCXV.22bis Modem Data Sheet Table 1-2. Default Countries Supported Argentina Australia Austria Belgium Brazil Bulgaria Canada Chile China Columbia Croatia Cyprus Czech Republic Denmark Egypt Estonia Finland France Germany Greece Hong Kong Hungary Iceland India Indonesia Ireland Israel Italy ...

Page 13

... CX20493 SmartDAA Line Side Device The CX20493 SmartDAA Line Side Device (LSD) includes a Line Side DIB Interface (LSDI), a coder/decoder (codec), and a Telephone Line Interface (TLI). The LSDI communicates with, and receives power and clock from, the SmartDAA interface in the CX84100 V.22bis Modem through the DIB. ...

Page 14

... CX84100-41/-23 SCXV.22bis Modem Data Sheet Information is transferred between the CX20493 LSD and the CX84100 V.22bis Modem through the DIB_P and DIB_N pins. These pins connect to the CX84100 V.22bis Modem DIB_DATAP and DIB_DATAN pins, respectively, through the DIB. The TLI integrates DAA and direct telephone line interface functions and connects directly to the line TIP and RING pins, as well as to external line protection components ...

Page 15

CX84100-41/-23 SCXV.22bis Modem Data Sheet Table 1-3. Supported AT Commands (Continued) +DR +DS +ER +ES +ESA +ESR +ETBM +GCI +IBC +IFC +ITF +MR +MS +PCW +VCID +VDR +VDT +VRID -HTRV -SLP -STE -TRV -TTE ...

Page 16

CX84100-41/-23 SCXV.22bis Modem Data Sheet 1-10 This page is intentionally blank. Conexant 102339C ...

Page 17

CX84100-41/-23 SCXV.22bis Modem Data Sheet 2. Technical Specifications 2.1 Serial DTE Interface Operation 2.1.1 Automatic Speed/Format Sensing Command Mode and Data Modem Mode. The modem can automatically determine the speed and format of the data sent from the DTE. The ...

Page 18

CX84100-41/-23 SCXV.22bis Modem Data Sheet 2.2 Establishing Data Modem Connections 2.2.1 Dialing Pulse Dialing. Pulse dialing is supported in accordance with EIA/TIA-496-A. Blind Dialing. The modem can blind dial in the absence of a dial tone if enabled by the ...

Page 19

CX84100-41/-23 SCXV.22bis Modem Data Sheet 2.2.8 Automode Automode detection can be enabled by the +MS command to allow the modem to connect to a remote modem (Table 2-1). Table 2-1. +MS Command Automode Connectivity <mod> V21 V22 V22B V23C B103 ...

Page 20

CX84100-41/-23 SCXV.22bis Modem Data Sheet 2.3.4 Escape Sequence Detection The +++ escape sequence can be used to return control to the command mode from the data mode. Escape sequence detection is disabled Register value greater than 127. ...

Page 21

CX84100-41/-23 SCXV.22bis Modem Data Sheet 2.4.3 V.42 bis Data Compression V.42 bis data compression mode, enabled by the %Cn command or S46 register, operates when a LAPM or MNP 2-4 connection is established. The V.42 bis data compression employs a ...

Page 22

CX84100-41/-23 SCXV.22bis Modem Data Sheet 2.6 Caller ID Both Type I Caller ID (On-Hook Caller ID) and Type II Caller ID (Call Waiting Caller ID) are supported for U.S. and many other countries (see Section 2.7). Both types of Caller ...

Page 23

... The first byte sent merely wakes up the modem, thus missing the first command. However, subsequent commands will get processed as normal operating mode resumes. The device power consumption, which includes the LSD or CX20493, is listed in Table 3-13. Table 2-3. Select Low-Power Mode (-SLP) Command Comparison Table ...

Page 24

CX84100-41/-23 SCXV.22bis Modem Data Sheet 2-8 This page is intentionally blank. Conexant 102339C ...

Page 25

... Hardware Interface 3.1 CX84100 V.22bis Modem Hardware Pins and Signals 3.1.1 CX84100 V.22bis Modem Signal Summary 3.1.1.1 CX20493 LSD Interface (Through DIB) The DIB interface signals are: • Clock and Power Positive (PWRCLKP); output • Clock and Power Negative (PWRCLKN); output • Data Positive (DIB_DATAP); input/output • ...

Page 26

CX84100-41/-23 SCXV.22bis Modem Data Sheet 3.1.1.5 Crystal/Clock and Power Signals Supported crystal and power signals are: • Crystal/Clock input: XTLI • Crystal return: XTLO • +3.3 V power: VDD • Ground; GND 3.1.2 CX84100 V.22bis Modem Pin Assignments and Signal ...

Page 27

CX84100-41/-23 SCXV.22bis Modem Data Sheet Figure 3-2. CX84100 V.22bis Modem 28-Pin TSSOP Pin Signals Table 3-1. CX84100 V.22bis Modem 28-Pin TSSOP Pin Signals Pin No 102339C ...

Page 28

CX84100-41/-23 SCXV.22bis Modem Data Sheet Table 3-2. CX84100 V.22bis Modem Pin Signal Definitions Label Pin XTLI 1 XTLO 2 RESET# 3 VDD 7, 22 VDD_CORE 24 GND 9, 25 LPO 23 RESERVED 13, 14, 15, 16, 19 DSPKOUT 28 PWRCLKP ...

Page 29

CX84100-41/-23 SCXV.22bis Modem Data Sheet Table 3-2. CX84100 V.22bis Modem Pin Signal Definitions (Continued) Label Pin TXD# 5 RXD# 4 CTS# 11 RLSD# 17 RI# 18 DTR# 12 102339C I/O I/O Type V.24 (EIA/TIA-232-E) DTE Serial Interface I Itpu/Ot2 Transmit ...

Page 30

CX84100-41/-23 SCXV.22bis Modem Data Sheet Table 3-2. CX84100 V.22bis Modem Pin Signal Definitions (Continued) Label Pin V.24 (EIA/TIA-232-E) DTE Serial Interface (Continued) RTS# 10 TDCLK# 8 RDCLK# 6 Notes: I/O Types: See Table 3-3. 3-6 I/O I/O Type I Itpu/Ot2 ...

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CX84100-41/-23 SCXV.22bis Modem Data Sheet Table 3-3. CX84100 V.22bis Modem I/O Type Definitions I/O Type Ix Input, wire Ox Output, wire Rx Oscillator pad, place 1%, 240 kΩ resistor from pad to VDD It/Ot2 Digital input tolerant, keeper/Digital ...

Page 32

... CX84100-41/-23 SCXV.22bis Modem Data Sheet 3.2 CX20493 LSD 28-Pin QFN Hardware Pins and Signals 3.2.1 CX20493 LSD 28-Pin QFN Signal Summary 3.2.1.1 CX84100 V.22bis 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 • ...

Page 33

... No Connect 3: NC3, pin 25; no internal connection 3.2.2 CX20493 LSD 28-Pin QFN Pin Assignments and Signal Definitions CX20493 LSD hardware interface signals 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 3-5. CX20493 LSD hardware interface signals are defined in Table 3-6. ...

Page 34

... CX84100-41/-23 SCXV.22bis Modem Data Sheet Figure 3-4. CX20493 LSD 28-Pin QFN Pin Signals Table 3-5. CX20493 LSD 28-Pin QFN Pin Signals Pin 3-10 CX20493 Signal Label GPIO1 15 AVdd VRef 18 RBias 19 AGnd 20 PWR+ 21 NC1 22 RXI EIC ...

Page 35

... Clock. Provides input clock, AC coupled to the LSD. Connect to DIB transformer secondary winding undotted terminal through C926 (closest to the CX20493), R932, then R922 in series. Connect the R932 and R922 node to LSD AGND pin through full-wave rectifier BR908. Place C926 near pin 26 and place R932 near C926. ...

Page 36

... AGND_LSD Isolated LSD Analog Ground (isolated from the host system ground) GND_LSD Isolated LSD Digital Ground (isolated from the host system ground) *See CX20493 LSD GPIO DC Electrical Characteristics (Table 3-9). 2. Refer to applicable reference design for exact component placement and values. 3-12 I/O Type Signal Name/Description ...

Page 37

... CX84100-41/-23 SCXV.22bis Modem Data Sheet 3.3 CX20493 LSD 32-Pin LQFP Hardware Pins and Signals 3.3.1 CX20493 LSD 32-Pin LQFP Signal Summary 3.3.1.1 CX84100 Interface (Through DIB) The DIB interface, power, and ground signals are: • Clock (CLK, pin 29); input • Digital Power (PWR+, pin 8); unregulated input power • ...

Page 38

... No Connect (NC, pin 17); no internal connection 3.3.2 CX20493 LSD 32-Pin LQFP Pin Assignments and Signal Definitions CX20493 LSD hardware interface signals are shown by major interface in Figure 3-5, are shown by pin number in Figure 3-6, and are listed by pin number in Table 3-7. CX20493 LSD hardware interface signals are defined in Table 3-8. ...

Page 39

... CX84100-41/-23 SCXV.22bis Modem Data Sheet Figure 3-6. CX20493 LSD 32-Pin LQFP Pin Signals Table 3-7. CX20493 LSD 32-Pin LQFP Pin Signals Pin 102339C CX20493 Signal Label DC_GND 17 AVdd 18 AVdd VRef 21 RBias 22 AGnd 23 PWR+ 24 DC_GND ...

Page 40

... Clock. Provides input clock, AC coupled to the LSD. Connect to DIB transformer secondary winding undotted terminal through C926 (closest to the CX20493), R932, then R922 in series. Connect the R932 and R922 node to LSD AGND pin through full-wave rectifier BR908. Place C926 near pin 29 (CLK) and place R932 near C926. ...

Page 41

... Digital output, TTL-compatible, 12 mA, Z INTERNAL = 32 Ω Ot12 AGND_LSD Isolated LSD Analog Ground GND_LSD Isolated LSD Digital Ground *See CX20493 LSD GPIO DC Electrical Characteristics (Table 3-9). 2. Refer to applicable reference design for exact component placement and values. 102339C I/O Type Signal Name/Description TIP and RING Interface Ia RING1 AC Coupled and TIP1 AC Coupled ...

Page 42

... CX84100-41/-23 SCXV.22bis Modem Data Sheet 3.4 CX20493 LSD GPIO DC Electrical Characteristics CX20493 LSD GPIO DC electrical characteristics are specified in Table 3-9. CX20493 LSD AVdd DC electrical characteristics are listed in Table 3-10. Table 3-9. CX20493 LSD GPIO DC Electrical Characteristics Parameter Input Voltage Input Voltage Low Input Voltage High ...

Page 43

CX84100-41/-23 SCXV.22bis Modem Data Sheet 3.5 Electrical and Environmental Specifications 3.5.1 Operating Conditions, Absolute Maximum Ratings, and Power Requirements The operating conditions are specified in Table 3-11. The absolute maximum ratings are listed in Table 3-12. The current and power ...

Page 44

CX84100-41/-23 SCXV.22bis Modem Data Sheet Table 3-13. Current and Power Requirements Mode Normal Mode: Off-hook, normal data connection Normal Mode: On-hook, idle, waiting for ring Low-Power Mode: Idle mode Low-Power Mode: Sleep mode Low-Power Mode: Stop mode Notes: 1. Operating ...

Page 45

CX84100-41/-23 SCXV.22bis Modem Data Sheet 3.6 Interface Timing and Waveforms 3.6.1.1 Serial DTE Interface The serial DTE interface waveforms for 1200 and 2400 bps are illustrated in Figure 3-7. Figure 3-7. Waveforms - Serial DTE Interface TDCLK 1200 BPS TXD ...

Page 46

CX84100-41/-23 SCXV.22bis Modem Data Sheet 3.7 Crystal Specifications Crystal specifications are listed in Table 3-14. Table 3-14. Crystal Specifications Frequency Calibration Tolerance Frequency Stability vs. Temperature Frequency Stability vs. Aging Oscillation Mode Calibration Mode Load Capacitance, C Shunt Capacitance, C ...

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CX84100-41/-23 SCXV.22bis Modem Data Sheet 102339C This page is intentionally blank. Conexant 3-23 ...

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...

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CX84100-41/-23 SCXV.22bis Modem Data Sheet 4. Package Dimensions The 28-pin TSSOP package dimensions are shown in Figure 4-1. The 28-pin QFN package dimensions are shown in Figure 4-2. The 32-pin LQFP package dimensions are shown in Figure 4-3. Figure 4-1. ...

Page 50

CX84100-41/-23 SCXV.22bis Modem Data Sheet Figure 4-2. Package Dimensions - 28-Pin QFN Pin 1 Identifier 2 3 TOP VIEW TERMINAL TIP NOTES: 1. DIMENSION b APPLIES TO PLATED TERMINAL AND IS ...

Page 51

CX84100-41/-23 SCXV.22bis Modem Data Sheet Figure 4-3. Package Dimensions - 32-Pin LQFP D D2 PIN 1 REF DETAIL A 102339C D1 DETAIL A Dim ...

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CX84100-41/-23 SCXV.22bis Modem Data Sheet 4-4 This page is intentionally blank. Conexant 102339C ...

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NOTES ...

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General Information: U.S. and Canada: (800) 854-8099 International: (949) 483-6996 Headquarters – Newport Beach 4000 MacArthur Blvd. Newport Beach, CA 92660 ...

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