SI2457-C-FS Silicon Laboratories Inc, SI2457-C-FS Datasheet - Page 44

• Manufacturer Part Number: SI2457-C-FS
• Description: IC ISOMODEM SYSTEM-SIDE 16SOIC
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2457-C-FS

• 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
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Si2457/34/15/04
44
Register
U3C
U3D
U4C
U4D
U3A
U3B
U3E
U3F
U4A
U4B
U4E
U33
U34
U35
U37
U38
U39
U40
U42
U43
U45
U46
U47
U48
U49
RGMN
RMOT
DTWD
DMOT
RGNX
PDMT
RGFH
RGFD
MOD1
PRDD
Name
PDBT
DTNT
DTPL
DTFT
PDIT
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
PD8
PD9
Description
Ringback cadence minimum on time in seconds multiplied by 7200.
Window to look for dialtone in seconds multiplied by 1000.
Minimum dialtone on time in seconds multiplied by 7200.
Number of pulses to dial 0.
Number of pulses to dial 1.
Number of pulses to dial 2.
Number of pulses to dial 3.
Number of pulses to dial 4.
Number of pulses to dial 5.
Number of pulses to dial 6.
Number of pulses to dial 7.
Number of pulses to dial 8.
Number of pulses to dial 9.
Pulse dial break time (ms units).
Pulse dial make time (ms units).
Pulse dial interdigit time (ms units).
DTMF power level—16-bit format is 0x0(H)(L)0 where H is the
(–)dBm level of the high-frequency DTMF tone and L is the (–)dBm level of
the low-frequency DTMF tone. Note that twist may be specified here.
DTMF on time (ms units).
DTMF off time (ms units).
Ring frequency high—Maximum frequency ring to be considered a valid ring.
RGFH = 2400/(maximum ring frequency).
Ring delta
Ring cadence minimum ON time in seconds multiplied by 2400.
Ring cadence maximum total time in seconds multiplied by 2400.
This is a bit-mapped register.
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.
Table 16. U-Register Description (Continued)
RGFD
=
2400 Hz
×
Rev. 1.1
⎛
⎝
---------------------------------------------- -
min ring freq (Hz)
1
⎞
⎠
–
⎛
⎝
----------------------------------------------- -
max ring freq (Hz)
1
⎞
⎠
Default
0x1B58
0x2D00
0x000A
0x003D
0x09B0
0x007A
0x1200
0x0001
0x0002
0x0003
0x0004
0x0005
0x0006
0x0007
0x0008
0x0009
0x0027
0x0320
0x0064
0x0064
0x0022
0x0258
0x6720
0x0000
0x0000