參數(shù)資料
型號(hào)： SI2457-D-GT
廠商： Silicon Laboratories Inc
文件頁(yè)數(shù)： 36/60頁(yè)
文件大?。?/td> 0K
描述： IC ISOMODEM GLOBAL DAA 24TSSOP
標(biāo)準(zhǔn)包裝： 62
系列： *
Si2457/34/15/04
Rev. 1.3
41
5. S-Registers
The S command allows reading (Sn?) or writing (Sn = x) the S-registers. The S-registers store values for functions
that typically are rarely changed, such as timers or counters, and the ASCII values of control characters, such as
carriage return. Table 13 summarizes the S-register set.
Table 13. S-Register Description
Definition
S-Register
(Decimal)
Function
Default
(Decimal)
Range
Units
0
Automatic answer—Number of rings the Si2457/34/15/
04 must detect before answering a call. 0 disables auto
answer.
0
0–255
Rings
1
Ring counter.
0
0–255
Rings
2
ESC code character.
43 (+)
0–255
ASCII
3
Carriage return character.
13 (CR)
0–255
ASCII
4
Linefeed character.
10 (LF)
0–255
ASCII
5
Backspace character.
08 (BS)
0–255
ASCII
6
Dial tone wait timer—Number of seconds the Si2457/
34/15/04 waits before blind dialing. Only applicable if
blind dialing is enabled (X0, X1, X3).
02
0–255
seconds
7
Carrier wait timer—Number of seconds the Si2457/34/
15/04 waits for carrier before timing out. This register
also sets the number of seconds the modem waits for
ringback when originating a call before hanging up.
This register also sets the number of seconds the
answer tone will continue while using the AT
*Y2A
command.
80
0–255
seconds
8
Dial pause timer for , and < dial command modifiers.
02
0–255
seconds
9
Carrier presence timer—Time after a loss of carrier
that a carrier must be detected before reactivating
DCD. S9 is referred to as “carrier loss debounce time.”
06
1–255
0.1 second
10
Carrier loss timer—Time the carrier must be lost before
the Si2457/34/15/04 disconnects. Setting 255 disables
disconnect entirely. If S10 is less than S9, even a
momentary loss of carrier causes a disconnect.
14
1–255
0.1 second
12
Escape code guard timer—Minimum guard time
required before and after “+++” for the Si2457/34/15/
04 to recognize a valid escape sequence.
50
1–255
0.02 second
14
Wait for dial tone delay value (in relation to the W dial
modifier). Starts when “W” is executed in the dial
string.
12
0–255
seconds
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