SI2457-C-FT Silicon Laboratories Inc, SI2457-C-FT Datasheet

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SI2457-C-FT

Manufacturer Part Number
SI2457-C-FT
Description
IC ISOMODEM SYSTEM-SIDE 24TSSOP
Manufacturer
Silicon Laboratories Inc
Datasheets

Specifications of SI2457-C-FT

Package / Case
24-TSSOP
Mfg Application Notes
SI2493/57/34/15/04, Appl Note AN93
Data Format
V.21, V.22, V.23, V.32, V.34, V.90, Bell 103, Bell 212A
Baud Rates
56k
Interface
Parallel, UART
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Operating Frequency
4.92 MHz
Supply Voltage (max)
3.6 V
Supply Voltage (min)
3 V
Supply Current
26 mA
Operating Temperature Range
0 C to + 70 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant

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V.9 0 , V.34, V. 3 2
Features
Applications
Description
The ISOmodem
speed from 56,000 bps to 2400 bps. Offered as a chipset with the Si2457,
Si2434, Si2415, or Si2404 system-side device and the Si3008 line-side
device, the ISOmodem utilizes the Silicon Laboratories patented Direct
Access Arrangement (DAA) technology to provide a programmable
telephone line interface with an unparalleled level of integration. These
compact solutions eliminate the need for a separate DSP, modem
controller, codec, transformer, relay, opto-isolators, clocking crystal, and
2-4 wire hybrid. Available with a system-side packaging option of either a
16-pin SOIC or a 24-pin TSSOP, these devices are ideal for embedded
modem applications due to their flexibility, small footprint, and minimal
external components.
Functional Block Diagram
Preliminary Rev. 0.7 3/05
CLKOUT
Data modem formats
Type I and II caller ID decode
No external ROM or RAM required
UART or parallel interface
AT command set support
SMS / MMS support
Set-top boxes
Point-of-sale terminals
Text/video telephones
RESET
D0-D7
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
RXD
DCD
TXD
RTS
ESC
CTS
WR
ITU-T, Bell
300 bps up to 56 kbps
V.21,V.22, V.29 Fast Connect
V.42, V.42bis, MNP2-5
Automatic rate negotiation
RD
CS
INT
A0
RI
CLKIN/XTALI
Interface
Interface
Parallel
Clocking
Serial
®
PLL
family of products is a complete modem ranging in
XTALO
Microcontroller
RAM/ROM
DSP
B I S
Data Bus
, V.22
Copyright © 2005 by Silicon Laboratories
Interface
DAA
Integrated DAA
other PTTs
27 MHz clock input
3.3 V power
Firmware upgradeable
EEPROM interface
Lead-free, RoHS Compliant
Packages
Digital video recorder
Digital televisions
Remote monitoring
B I S
Over 6000 V Capacitive isolation
Parallel phone detect
Compliant with FCC, JATE, and
Overcurrent detection
ISOB
S i 2 4 5 7 / 3 4 / 1 5 / 0 4 - S i 3 0 0 8
AOUT
I SO
To Phone Line
M O D E M
®
W I T H
those chipset combinations listed
CLKOUT/EECS/A0
This data sheet is valid only for
CLKIN/XTALI
CLKIN/XTALI
FSYNC/D6
I
Ordering Information
TXD/WR
N T E G R A T E D
RXD/RD
VREG
CTS/CS
RTS/D7
RESET
XTALO
RESET
XTALO
Pin Assignments
on page page 68.
VD3.3
C1B
C2B
CID
GND
VDA
RXD
TXD
CTS
V
RI
D
Si2457/34/15/04
Si2457/34/15/04
(24-Pin Option)
(16-Pin Option)
Si2457/34/15/04-Si3008
1
1
2
5
8
1
10
11
12
2
3
3
4
6
7
2
3
4
5
6
7
8
9
4
Si3008
IGND
9
15
24
23
22
20
19
18
17
16
15
14
13
16
14
13
12
11
10
21
9
8
7
6
5
RTS
DCD
ESC
INT
C2A
DCD/D4
ESC/D3
VD3.3
GND
SDI/EESD/D2
RI/D1
INT/DO
V
GND
C1A
SDO/EECLK/D5
VDB
AOUT/INT
C1A
C2A
RX
DCT
QB
QE
A
DAA

Related parts for SI2457-C-FT

SI2457-C-FT Summary of contents

Page 1

... The ISOmodem family of products is a complete modem ranging in speed from 56,000 bps to 2400 bps. Offered as a chipset with the Si2457, Si2434, Si2415, or Si2404 system-side device and the Si3008 line-side device, the ISOmodem utilizes the Silicon Laboratories patented Direct Access Arrangement (DAA) technology to provide a programmable telephone line interface with an unparalleled level of integration ...

Page 2

... Si2457/34/15/04-Si3008 2 Preliminary Rev. 0.7 ...

Page 3

... Section 1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3. Bill of Materials: Si2457/34/15/04 Chipset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.1. Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.2. Parallel Interface (24-Pin Version Only 4.3. Command Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 4.4. Data Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.5. Fast Connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 4.6. V.80 Synchronous Access Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.7. Clocking/Low Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4 ...

Page 4

... The Si2457/34/15/04 specifications are guaranteed when the typical application circuit (including component tolerance) and any Si2457/34/15/04 and any Si3008 are used. See "2. Typical Application Schematic" on page 10. 2. All minimum and maximum specifications are guaranteed and apply across the recommended operating conditions. ...

Page 5

... Pullup Resistance Pins 9,11, 15, 16 (16-pin option) * Total Supply Current * Total Supply Current, Powerdown *Note: All inputs All inputs held static except clock and all outputs unloaded (Static I D Si2457/34/15/04-Si3008 + 600 Ω µF – = 3 Symbol ...

Page 6

... log |Vin log (rms signal/rms noise). Applies to both transmit and receive paths. Vin = 1 kHz, –3 dBFS. 4. Vin = 1 kHz, –3 dBFS. THD = 20 x log (rms distortion/rms signal). Table 5. Absolute Maximum Ratings Parameter DC Supply Voltage Input Current, Si2457/34/15/04 Digital Input Pins Digital Input Voltage CLKIN/XTALI Input Voltage Operating Temperature Range Storage Temperature Range Note: Permanent device damage may occur if the above absolute maximum ratings are exceeded ...

Page 7

... Chip Select Setup Chip Select Hold RD Low Pulse Width RD Low to Data Driven Time Data Hold RD High to Hi-Z Time Read Cycle Time Note: All timing is referenced to the 50% level of the waveform. Input test levels are V Si2457/34/15/04-Si3008 Symbol Min Typ 2.048 — t –1 — ...

Page 8

... Si2457/34/15/04-Si3008 UART Time for Modem Receive Path (8N1 Mode) 8-B it Data M ode tart RTS UART Timing for Modem Transmit Path (9N1 Mode with 9th Bit Escape) 9-B it Data M ode tart CTS Figure 2. Asynchronous UART Serial Interface Timing Diagram Preliminary Rev. 0.7 ...

Page 9

... CSS ADDRESS = RLDD D[7:0] Figure 3. Parallel Interface Read Timing t CSS ADDRESS = D[7:0] Figure 4. Parallel Interface Write Timing Si2457/34/15/04-Si3008 t CSH VALID DATA t CSH DSU t DH VALID DATA Preliminary Rev. 0.7 VALID DATA t RLDD VALID DATA 9 ...

Page 10

... Si2457/34/15/04-Si3008 2. Typical Application Schematic epad IGND GND 12 Preliminary Rev. 0.7 ...

Page 11

... IGND VDB 19 VDA 7 3.3 VD GND 21 20 VD3.3 GND 5 6 Preliminary Rev. 0.7 Si2457/34/15/04-Si3008 11 ...

Page 12

... Si2457/34/15/04-Si3008 3. Bill of Materials: Si2457/34/15/04 Chipset Component C1 C5, C50, C52 C8 C11 2 C40, C41 C51, C53 3 D1, D2 Dual Diode, 225 mA, 300 V, CMPD2004S FB1, FB2 Q1 RV1 R5 R7, R8 R10 R12, R13 7 R15, R16 R18 R19 1 R20, R21 U1 U2 2,8 4.9152 MHz, 20 pF, 100 ppm, 150 Ω ESR ...

Page 13

... Data Format Bit asynchronous Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. Si2457/34/15/04-Si3008 Specification ITU-T V.90 ITU-T V.90 ITU-T V.90 ITU-T V.90 ITU-T V.90 ITU-T V.90 ITU-T V ...

Page 14

... Bell 103 Originate mode Answer mode Output Level Permissive—Switched network Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. 14 Specification 1 2 ITU-T V.90 , V.34 , V.32bis, V.32, V.23, V.22bis, V.22, V.21, Bell 212A, and Bell 103 Two-wire full duplex V ...

Page 15

... Dialing DTMF Output Level Pulse Dial Ratio Ring Cadence Call Progress Monitor Notes: 1. Supported on Si2457 only. 2. Supported on Si2457 and Si2434 only. 3. Supported on Si2457, Si2434, and Si2415 only. Si2457/34/15/04-Si3008 Specification As specified by ITU-T As specified by ITU-T 1800 Hz ±7 Hz 1800 Hz ±7 Hz 1700 Hz ±7 Hz 2400 Hz ±7 Hz 1200 Hz ± ...

Page 16

... D2 (Si2457/34/15/04, pin 18) and GND energy, emissions, (Si2457/34/15/04, pin 6), the DTE rate is set to a 19.2 kbps baud rate (see Table 9). 4.1.1. Autobaud The Si2457/34/15/04 includes an automatic baud rate detection feature that allows the host to start ...

Page 17

... CS (parallel mode) occurs. Additionally, the Si2457/34/15/04 may be placed in a complete powerdown mode or wake-on-ring mode. Complete powerdown U65[13] (PDN). Once the PDN bit is written, the Si2457/ 34/15/04 completely powers down and can only be powered back on via the RESET pin. Preliminary Rev. 0.7 is ...

Page 18

... Wire Mode Wire mode is used to communicate with standard non- error correcting modems. When optioned with \N3, the Si2457/34/15/04 falls back to wire mode if it fails in an attempt to negotiate a V.42 link with the remote modem. Error correction and data compression are not active in wire mode ...

Page 19

... LVC S BITS CTR21 only 20 LVCS BITS Si2457/34/15/04-Si3008 Loop Voltage (V) Figure 7. Loop Voltage Loop Current (mA) Figure 8. Loop Current Preliminary Rev. 0 100 Overload 140 19 ...

Page 20

... Si2457/34/15/04 goes off- hook. This allows the Si2457/34/15/04 to detect connected to an improper telephone line. The overcurrent detection feature may be enabled by setting the OCDM bit (U70, bit 11). OHT (U77, bits 8:0) sets the delay after off-hook until the loop current is measured. ...

Page 21

... POLARITY REVERSAL” polarity reversal was not detected. In each case, the result code is followed by “OK”. If the S7 timeout occurs before a busy tone is detected, the Si2457/34/15/04 will report “NO CARRIER”. Polarity reversal monitoring begins after the last digit is dialed and ends when the busy tone is detected or S7 timeout occurs ...

Page 22

... Command Go off-hook. H1 Identification and checksum. In Display Si2457/34/15/04 revision code Revision B C: Revision C, etc. Display Si2457/34/15/04 firmware revision code (numeric). I1 Display line-side revision code. I3 08C = Si3008 revision C Display the ISOmodem® model number. I6 “2404” = Si2404 “2415” = Si2415 “2434” = Si2434 “ ...

Page 23

... Command Call Progress Monitor (CPM)—This command controls which CPM signals are monitored Xn and reported to the host from the Si2457/34/15/04. (See Table 15 on page 35.) Basic results; disable CPM—Blind dial (does not wait for dial tone). CONNECT message X0 does not include speed. ...

Page 24

... Si2457/34/15/04-Si3008 Table 11. Basic AT Command Set (Command Defaults in Bold) (Continued) Command +DR=X Data compression reporting. X Mode 0 Disabled 1 Enabled If enabled, the intermediate result code is transmitted at the point after error control negotia- tion. The format of this result code is as follows: Result code +DR:NONE +DR:V42B ...

Page 25

... FCLASS = 0 must be sent to restore the ISOmodem® to normal operation after test. 54 Same as &T4, but transmit V.29 9600 bps. Data pattern set by S40 register FCLASS = 0 must be sent to restore the ISOmodem to normal operation after test. 95 V.29 short synchronous. 96 V.29 full synchronous. Si2457/34/15/04-Si3008 Action Preliminary Rev. 0.7 25 ...

Page 26

... Si2457/34/15/04-Si3008 Table 11. Basic AT Command Set (Command Defaults in Bold) (Continued) Command Country settings - Automatically configure all registers for a particular country. +GCI = X X Country 0 Japan 16 Brazil 20 Canada 26 China 27 Columbia 35 Ecuador 50 Hong Kong 51 Hungary 53 India 6C Malaysia 73 Mexico 89 Philippines 8A Poland 9C Singapore B8 Russia B5 United States FE Taiwan Note: U-registers are configured to Silicon Laboratories’ ...

Page 27

... Type II caller ID information — The Si2493 will display “+VCDIR:” followed by raw caller ID +VCIDR? information including checksum. Si2457/34/15/04-Si3008 Action e.g. +MRR: 14400 ITU-T V.21 ITU-T V.22 ITU-T V.22bis (default for Si2404) ITU-T V.32 ITU-T V.32bis (default for Si2415) ITU-T V.34 (default for Si2434) ITU-T V.90 (default for Si2457) Disabled Enabled Preliminary Rev. 0.7 27 ...

Page 28

... Si2457/34/15/04-Si3008 4.19. Extended AT Commands The extended AT commands are supported by the Si2457/34/15/04 and are described in Tables 12 through 14. Table 12. Extended AT& Command Set (Command Defaults in Bold) Command Display AT& current settings. &$ ESC is not used &D0 ESC escapes to command mode from data mode if also enabled by HES U70, bit 15. ...

Page 29

... Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the &T2 DSP (Si2457/34/15/04 device) only. ISOmodem® echoes data from TX pin (Register 0 in parallel mode) back to RX pin (Register 0 in parallel mode). Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the & ...

Page 30

... Automatic Line Status Detection. After the %V1 and %V2 commands are issued, the Si2457/34/15/04 will automatically check the telephone connection for whether or not a line is present line is present, the Si2457/34/15/04 will automatically check if the line is already in use. Finally, the Si2457/34/15/04 will check line status both before going off-hook and again before dialing ...

Page 31

... NLIU) < LCVS The NLIU register is updated every 1 ms with the minimum non-zero value of LVCS in the last 30 ms. This allows the Si2457/34/15/04 to eliminate errors due to 50/60 Hz interference and also adapt to relatively slow change in the on-hook dc reference value on the telephone line. This algo- rithm does not allow any non-zero values for NLIU below 0x0007 ...

Page 32

... V.42 auto-reliable—The Si2457/34/15/04 attempts to connect with the V.42 protocol. If unsuc- cessful, the MNP protocol is attempted. If unsuccessful, wire mode is attempted. \N4 V.42 (LAPM) reliable mode (or drop call)—Same as \N3 except that the Si2457/34/15/04 drops the call instead of connecting in MNP or wire mode. \N5 V.42 and MNP reliable mode—The Si2457/34/15/04 attempts to connect with V.42. If unsuccessful, MNP is attempted ...

Page 33

... DTE rate—Change DTE rate. When the Si2457/34/15/04 is configured in autobaud mode (default), \T0 through \T15 will lock the new baud rate and disable autobaud. On the 24-pin version, the ISO- modem® is not in autobaud mode (pin 18 low on powerup), the result code “OK” is sent at the old DTE rate ...

Page 34

... Si2457/34/15/04-Si3008 Table 14. Extended AT\ Command Set (Command Defaults in Bold) (Continued) Command \Vn Connect message type \V0 Report connect message and protocol message \V2 Report connect message only (exclude protocol message) \V4 Report connect and protocol message with both upstream and downstream connect rates. Notes: 1. When in autobaud mode, \B0, \B1, and \P1 will not be detected automatically. The combination of \B2 and \P3 will be detected ...

Page 35

... Hookswitch flash detected Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434 the only verbal response code that does not follow the <CR><LF>Result Code<CR><LF> standard. There is no leading <CR><LF>. ...

Page 36

... V.42bis protocol 80 MNP2 protocol Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434 the only verbal response code that does not follow the <CR><LF>Result Code<CR><LF> standard. There is no leading <CR><LF>. ...

Page 37

... DTMF dial attempted on a pulse dial only line Notes: 1. This message is only supported on the Si2457, Si2434, and Si2415. 2. This message is only supported on the Si2457 and Si2434 the only verbal response code that does not follow the <CR><LF>Result Code<CR><LF> standard. There is no leading < ...

Page 38

... If S10 is less than S9, even a momentary loss of carrier causes a disconnect. 12 Escape code guard timer—Minimum guard time required before and after “+++” for the Si2457/34/15 recognize a valid escape sequence. 14 Wait for dial tone delay value (in relation to the W dial modifier). Starts when “ ...

Page 39

... Allowable Data Rates Symbol Rate 2400 2400–21600 2743 4800–26400 2800 4800–26400 3000 4800–28800 3200 4800–31200 3429 4800–33600 Si2457/34/15/04-Si3008 Definition Function Preliminary Rev. 0.7 Default Range Units (Decimal) 0 0–255 seconds 0 0–255 minutes 20 0– ...

Page 40

... Table 16. S-Register Description (Continued) S-Register (Decimal) 42 Blacklisting—The Si2457/34/15/04 will not dial the same number more than two times in three minutes. An attempt to dial a third time within three minutes will result in a “BLACKLISTED” result code. If the blacklist memory is full, any dial to a new number will result in a “ ...

Page 41

... DT4A2 U13 DT4A1 U14 DTK Dial tone detect filter output scaler. U15 DTON Dial tone detect ON threshold. U16 DTOF Dial tone detect OFF threshold. Si2457/34/15/04-Si3008 Table 17. U-Register Description Preliminary Rev. 0.7 Default 0x0800 0x0000 0x0000 0x0000 0x0000 0x00A0 0x6EF1 0xC4F4 0xC000 ...

Page 42

... Si2457/34/15/04-Si3008 Table 17. U-Register Description (Continued) Register Name Description U17 BT1A0 BT1 registers set the coefficients for stage 1 of the Busy Tone Detect filter. Default is for FCC countries. See “AN93: Modem Designer’s Guide” for other U18 BT1B1 country settings. U19 ...

Page 43

... RGNX Ring cadence maximum total time in seconds multiplied by 2400. U4D MOD1 This is a bit-mapped register. U4E PRDD Pre-dial delay-time after ATD command that modem waits to dial (ms units). The Si2457/34/15/04 stays on-hook during this time. Si2457/34/15/04-Si3008 ⎛ ⎞ ⎛ 1 × 2400 Hz ---------------------------------------------- - ...

Page 44

... Register Name Description U4F FHT Flash Hook Time. Time corresponding with “!” or “&” dial modifier that the Si2457/34/15/04 goes on-hook during a flash hook (ms units). U50 LCDN Loop current debounce on time (ms units). U51 LCDF Loop current debounce off time (ms units). ...

Page 45

... SAS cadence 7. Sets the duration of the fourth SAS silence (ms). UA8 SC8 SAS cadence 8. Sets the duration of the fifth SAS tone (ms). UA9 SC9 SAS cadence 9. Sets the duration of the fifth SAS silence (ms). UAA V29MODE This is a bit mapped register. Si2457/34/15/04-Si3008 Preliminary Rev. 0.7 Default 0x0000 0x001E 0x0000 0x0000 0x0000 0x0000 ...

Page 46

... Si2457/34/15/04-Si3008 Table 18. Bit-Mapped U-Register Summary Reg. Name Bit Bit Bit U4D MOD1 TOCT U53 MOD2 REV U62 DAAC1 U63 DAAC3 U65 DAAC4 PWMG PDN U66 DAAC5 U67 ITC1 U68 ITC2 U6C LVS U6E CK1 U6F PTME U70 IO0 HES TES U71 ...

Page 47

... Reserved Read returns zero. 5 GT18 1800 Hz Guard Tone Enable Disable Enable. 4 GT55 550 Hz Guard Tone Enable Disable Enable. 3 CTE Calling Tone Enable Disable Enable. 2:0 Reserved Read returns zero. Si2457/34/15/04-Si3008 D11 D10 CLPD FTP SPDM R/W R/W R/W R/W Function Preliminary Rev. 0 ...

Page 48

... Si2457/34/15/04-Si3008 U53 MOD2 Bit D15 D14 D13 D12 Name REV Type R/W Reset settings = 0x0000 Bit Name 15 REV V.23 Reversing Disable Enable. 14:0 Reserved Read returns zero. U62 DAAC1 Bit D15 D14 D13 D12 Name Type Reset settings = 0x0804 Bit Name 15:12 Reserved Must be set to 0 ...

Page 49

... Reserved Read returns zero. 14 PWMG PWM Gain gain gain applied to AOUT. 13 PDN Powerdown. Completely powerdown the Si2457/34/15/04 and Si3008. Once set to 1, the Si2457/34/15/04 must be reset to power on Normal Powerdown. 12:8 Reserved Read returns zero. 7:5 Reserved Must not change in a read-modify-write. 4 PDL* Powerdown Line-Side Chip ...

Page 50

... Si2457/34/15/04-Si3008 U66 DAAC5 Bit D15 D14 D13 D12 Name Type Reset settings = 0x0040 Bit Name 15:7 Reserved Read returns zero. 6 FDT* Frame Detect Indicates ISOmodem has not established frame lock Indicates ISOmodem frame lock has been established. 5:4 Reserved Read returns zero. ...

Page 51

... ROV Receive Overload. The bit is set when the receive input (i.e., receive pin goes below ground) has an excessive input level. This bit is cleared by writing this location Normal receive input level Excessive receive input level. Reserved Read returns zero. 0 Si2457/34/15/04-Si3008 D10 Function . ...

Page 52

... Si2457/34/15/04-Si3008 U6C LVS Bit D15 D14 D13 D12 Name LVS[7:0] Type R Reset settings = 0xXX00 Bit Name 15:8 LVS[7:0] Line Voltage Status. Eight bit signed, twos complement number representing the tip-ring voltage. Each bit repre- sents 1.19 V. Polarity of the voltage is represented by the MSB (sign bit). ...

Page 53

... D15 D14 D13 D12 Name Type Reset settings = 0x00FF Bit Name 15:8 Reserved Do not modify 7:0 PTMR[7:0] Parallel Port Receive FIFO Interrupt Timer. See “AN93: Modem Designer’s Guide” for details. Si2457/34/15/04-Si3008 D11 D10 R1[4:0] R/W Function D11 D10 D9 D8 ...

Page 54

... Parallel Phone Detect (sticky). Parallel phone detected since last off-hook event. Clears on :I read Ring Indicator. Active high bit when the Si2457/34/15/04 is on-hook, indicates ring event has occurred. Clears on :I read. 0 DCD Data Carrier Detect (status). Active high bit indicates carrier detected (equivalent to inverse of DCD pin). ...

Page 55

... ACL represents the value of LVCS current when the ISOmodem® is off-hook and all parallel phones are on-hook. If ACL = ignored by the off-hook intrusion algorithm.The ISOmo- dem will also write ACL with the contents of LVCS before an intrusion and before going on- hook (default = 0). Si2457/34/15/04-Si3008 ...

Page 56

... Si2457/34/15/04-Si3008 U77 GEN2 Bit D15 D14 D13 D12 Name IST[3:0] Type R/W Reset settings = 0x401E Bit Name 15:12 IST[3:0] Intrusion Settling Time (250 ms units). Delay between when the ISOmodem goes off-hook and the off-hook intrusion algorithm begins. Default HOI Hang-Up On Intrusion. ...

Page 57

... CARRIER”). 13:8 Reserved Read returns zero. 7:0 IS[7:0] Intrusion Suspend (500 ms units). When this register sets the length of time from when dialing begins that the off-hook intrusion algorithm is blocked (suspended) (default = 00000000 Si2457/34/15/04-Si3008 D11 D10 Function Preliminary Rev. 0.7 ...

Page 58

... Si2457/34/15/04-Si3008 U79 GEN4 Bit D15 D14 D13 D12 Name Type Reset settings = 0x00XX Bit Name 15:5 Reserved Read returns zero. 4:0 LVCS[4:0] Line Voltage Current Sense. Represents either the line voltage, loop current, or on-hook line monitor. On-Hook Voltage Monitor (2.75 V/bit ±20%). ...

Page 59

... Disable Attempt DTMF dial, then fall back to pulse dialing if unsuccessful. First digit is dialed as DTMF dialtone is still present after two seconds, the Si2457/34/15/04 will redial the first digit and remaining digits as pulse dialtone is not present after two seconds, the Si2457/34/15/04 will dial the remaining digits as DTMF. ...

Page 60

... Si2457/34/15/04-Si3008 U7C GENC Bit D15 D14 D13 D12 D11 D10 Name Type Reset settings = 0x0000 Bit Name 15:5 Reserved Reads returns to zero. 4 RIGPO RI RI (Pin 17), follows this bit when RIGPIOEN = 1 3:1 Reserved Reads returns to zero. 0 RIGPOEN indicates valid ring signal. (Normal ring-indicator mode (Pin 17) can be used as a general purpose output and follows U7C[4] (RIGPO) ...

Page 61

... UAA V.29 Mode Bit D15 D14 D13 D12 D11 D10 Name Type Reset settings = 0x0000 Bit Name 15:2 Reserved Reads returns to zero. 1 V29ENA 0 = Disables V.29 Enables V.29. 0 Reserved Read returns zero. Si2457/34/15/04-Si3008 D10 MINT SERM FSMS R/W R/W R/W Function Function Preliminary Rev ...

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... Si2457/34/15/04-Si3008 7. Parallel Interface Registers Parallel Interface 0 (0x00) Bit Name Type Reset settings = 0x00 Bit Name 7:0 TX/RX[7:0] Parallel Interface Transmit/Receive. This register functions similarly to the serial port TX pin on writes to the parallel port, and sim- ilarly to the serial port RX pin on reads from the parallel port. ...

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... Operation of this bit in parallel mode is functionally equivalent to the CTS pin in serial mode. Use of the CTS and RTS bits (as opposed to the TXE and RXF bits) allows the flow control between the host and the ISOmodem to operate 1 byte at a time, rather than in blocks. Si2457/34/15/04-Si3008 D4 D3 ...

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... TXD Transmit Data. Data input from DTE TXD pin. 7 CTS Clear to Send. Signals that the Si2457/34/15/04 is ready to receive more digital data on the TXD pin. 8 RESET Reset Input. An active low input that is used to reset all control registers to a defined, initialized state. 9 C2A Isolation Capacitor 2A ...

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... FSYNC/D6 Frame Sync/Data Bit. Frame Sync output to codec in serial mode. Bidirectional parallel bus data bit 6 in parallel mode VD3.3 Digital Supply Voltage. Provides the 3.3 V supply voltage to the Si2457/34/15/04 GND Ground. Connects to the system digital ground. 7,19 VDA, VDB Regulator Voltage Reference. ...

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... Data input from DTE TXD pin in serial mode. Active low write enable pin in paral- lel mode. 11 CTS/CS Clear to Send/Chip Select. Signals that the Si2457/34/15/04 is ready to receive morre digital data on the TXD pin in data mode. Active low chip select in parallel mode. 12 RESET Reset Input. ...

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... Pin Descriptions: Si3008 Pin # Pin Name 1 C1B Isolation Capacitor 1B. Connects to one side of isolation capacitor C1 and communicates with the Si2457/ 34/15. 2 C2B Isolation Capacitor 2B. Connects to one side of isolation capacitor C2 and communicates with the Si2457/ 34/15. 3 VREG Voltage regulator. Connects to an external capacitor to provide bypassing for an internal power supply. ...

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... Notes: 1. Add an “R” at the end of the device to denote tape and reel option; 2500 quantity per reel. 2. “X” denotes product revision. 68 Digital Package Digital TSSOP-24 Si2457-X-FT SOIC-16 Si2457-X-FS TSSOP-24 Si2434-X-FT SOIC-16 Si2434-X-FS TSSOP-24 Si2415-X-FT SOIC-16 Si2415-X-FS TSSOP-24 Si2404-X-FT ...

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... Package Outline: 24-Pin TSSOP Figure 9 illustrates the package details for the Si2457/34/15/04 24-pin packaging option. Table 19 lists the values for the dimensions shown in the illustration. ddd (2x Figure 9. 24-Pin Thin Shrink Small Outline Package (TSSOP) Table 19. Package Diagram Dimensions Si2457/34/15/04-Si3008 θ bbb ...

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... Si2457/34/15/04-Si3008 13. Package Outline: 16-Pin SOIC Figure 10 illustrates the package details for the Si3008 and the Si2457/34/15/04 16-pin packaging option. Table 20 lists the values for the dimensions shown in the illustration aaa Seating Plane Figure 10. 16-pin Small Outline Integrated Circuit (SOIC) Package Table 20 ...

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... Package Outline: 8-Pin Exposed Pad SOIC (Si3008) Figure 11 illustrates the package details for the Si3008. Table 21 lists the values for the dimensions shown in the illustration. Figure 11. 8-pin Exposed Pad Small Outline Integrated Circuit (SOIC) Package Table 21. Package Diagram Dimensions Si2457/34/15/04-Si3008 Millimeters Symbol Min Max A 1 ...

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... Si2457/34/15/04-Si3008 C I ONTACT NFORMATION Silicon Laboratories Inc. 4635 Boston Lane Austin, TX 78735 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Email: ISOinfo@silabs.com Internet: www.silabs.com The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. ...

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