SI2457-C-FT Silicon Laboratories Inc, SI2457-C-FT Datasheet - Page 24

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

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

Si2457/34/15/04-Si3008
24
+DS Options
+DS = A
+DS = A,B
+DS = A,B,C
+DS = A,B,C,D
+ES Options
+ES = A
+ES = A,,C
Command
+DR=X
Table 11. Basic AT Command Set (Command Defaults in Bold) (Continued)
Data compression reporting.
X
0
1
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
+DR:V42B RD
+DR:V42B TD
Controls V.42bis data compression function.
A
B
C
D
Enable synchronous access mode.
A
B
C
Specifies fallback mode of operation.
D Disable synchronous access mode.
6 Enable synchronous access mode when connection is completed and data state is
D Disable synchronous access mode.
8 Enable synchronous access mode when connection is completed and data state is
Mode
Disabled
Enabled
Direction
Compression_negotiation
Maximum dictionary size
512
Maximum string size
6 to 250 (28 default)
Specifies the mode of operation when initiating a modem connection.
This parameter should not be used.
Specifies the mode of operation when answer a modem connection.
0 No compression
1 Transmit only
2 Receive only
3 Both Directions
0 Do not disconnect if V.42 is not negotiated.
1 Disconnect is V.42 is not negotiated.
entered.
entered.
Mode
Data compression is not in use
Rec. V.42bis is in use in both directions
Rec. V.42bis is in use in receive direction only
Rec. V.42bis is in use in transmit directions only
Preliminary Rev. 0.7
Action