參數(shù)資料
型號： SI2494-A-GM
廠商： Silicon Laboratories Inc
文件頁數(shù)： 37/70頁
文件大?。?/td> 0K
描述： IC ISOMODEM 56KBPS 38-QFN
標準包裝： 364
系列： *
Si2494/39
42
Rev. 1.0
&H2
V.34 with automatic fallback (33.6 kbps to 300 bps)
&H3
V.34 only (33.6 kbps to 2400 bps)
&H4
ITU-T V.32bis with automatic fallback (14.4 kbps to 300 bps)
&H5
ITU-T V.32bis only (14.4 kbps to 4800 bps)
&H6
ITU-T V.22bis only (2400 bps or 1200 bps)
&H7
ITU-T V.22 only (1200 bps)
&H8
Bell 212 only (1200 bps)
&H9
Bell 103 only (300 bps)
&H10
ITU-T V.21 only (300 bps)
&H11
V.23 (1200/75 bps)
&H12
V.92 with automatic fallback
&Pn
Japan pulse dialing
&P0
Configure Si2494/39 for 10 pulse-per-second pulse dialing. For Japan.
&P1
Configure Si2494/39 for 20 pulse-per-second pulse dialing. For Japan.
&Tn
Test mode
&T0
Cancel test mode (Escape to command mode to issue AT&T0). This command will also report the
number of bit errors encountered on the previous &T4 or &T5 test.
&T2
Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the
DSP (Si2494/39 device) only. ISOmodem echoes data from TX pin (Register 0 in parallel mode)
back to RX pin (Register 0 in parallel mode).
&T3
Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the
DSP (Si2494/39), DAA interface section (Si2494/39), DAA interface (Si3018), and analog hybrid cir-
cuit (Si3018). ISOmodem echoes data from TX pin (Register 0 in parallel mode) back to RX pin
(Register 0 in parallel mode). Phone line termination required as in Figure 1. To test only the link
operation, the hybrid and AFE codec can be removed from the test loop by setting the DL bit (U62,
bit 1).
&T4
Initiate transmit as originating modem with automatic data generation. Modulation, data rate, and
symbol rate are set by &H, &G, and S41. Data pattern is set by the S40 register. Continues until the
ATH command is sent after an escape into command mode. Data is also demodulated as in
ANALOOP, and any bit errors are counted to be displayed after the test using &T0.
&T5
Initiate transmit as answering modem with automatic data generation. Modulation, data rate, and
symbol rate are set by &H, &G, and S41. Data pattern is set by the S40 register. Continues until the
ATH command is sent after an escape into command mode. Data is also demodulated as in
ANALOOP, and any bit errors are counted to be displayed after the test using &T0.
&T6
Compute checksum for firmware-upgradeable section of program memory. If no firmware upgrade is
installed, &T6 returns 0x4474.
Table 11. Extended AT& Command Set (Command Defaults in Bold) (Continued)
Command
Action
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