SI2457-C-GT Silicon Laboratories Inc, SI2457-C-GT Datasheet - Page 56

• Manufacturer Part Number: SI2457-C-GT
• Description: IC ISOMODEM SYSTEM-SIDE 24TSSOP
• Manufacturer: Silicon Laboratories Inc

Specifications of SI2457-C-GT

• 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: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Si2457/34/15/04
U70 IO0
Reset settings = 0x2700
56
Name
Type
6:5
Bit
15
14
13
12
11
10
Bit
9
8
7
4
3
2
1
0
Reserved Read returns zero.
Reserved Must be set to zero.
Reserved Read returns zero.
D15
HES
R/W
OCDM
DCDM
PPDM
Name
CIDM
OCD
DCD
HES
PPD
TES
RIM
CID
RI
D14
Hardware Escape Pin.
0 = Disable.
1 = Enable.
Enable “+++” Escape.
0 = Disable.
1 = Enable.
Caller ID Mask.
0 = Change in CID will not affect INT.
1 = A low to high transition in CID activates INT.
Overcurrent Detect Mask.
0 = Change in OCD does not affect INT. (“X” result code is not generated in command
mode.)
1 = A low to high transition in OCD will activate INT. (“X” result code is generated in command
mode.)
Parallel Phone Detect Mask.
0 = Change in PPD does not affect INT.
1 = A low to high transition in PPD will activate INT.
Ring Indicator.
0 = Change in RI does not affect INT.
1 = A low to high transition in RI activates INT.
Data Carrier Detect Mask.
0 = Change in DCD does not affect INT.
1 = A high to low transition in DCD (U70, bit 0), which indicates loss of carrier, activates
INT.
Caller ID (sticky).
Caller ID preamble has been detected; data will soon follow. Clears on :I read.
Overcurrent Detect (sticky).
Overcurrent condition has occurred. Clears on :I read.
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.
Data Carrier Detect (status).
Active high bit indicates carrier detected (equivalent to inverse of DCD pin).
D13
TES
R/W
CIDM OCDM PPDM
D12
R/W
D11
R/W
D10
R/W
RIM
R/W
D9
Rev. 1.1
DCDM
R/W
D8
Function
D7
0
D6
D5
R/W
CID
D4
OCD
R/W
D3
PPD
R/W
D2
R/W
D1
RI
DCD
R/W
D0