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參數(shù)資料
| 型號(hào)： | SI2494-A-GM |
| 廠商： | Silicon Laboratories Inc |
| 文件頁(yè)數(shù)： | 24/70頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC ISOMODEM 56KBPS 38-QFN |
| 標(biāo)準(zhǔn)包裝： | 364 |
| 系列： | * |
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Si2494/39
30
Rev. 1.0
*Y[sequence]
Special Access Mode—This command enables special modes and data memory access.
[sequence]
Description
254:Waaaa,dddd
Write hexadecimal data value dddd to hexadecimal data address
aaaa. Only one 254:W command per line.
254:Qaaaa
Read hexadecimal address aaaa. Returns hexadecimal data value
dddd. Only one 254:Q command per line.
2
Enable continuous answer tone for the ATA command. Use ATZ to
clear this mode. For example, the single-line, multiple command is
AT*Y2A.
1
Enable continuous DTMF tone for first digit used in the ATD com-
mand. Use ATZ to clear this mode. For example, the single-line, mul-
tiple command for a continuous DTMF “1” digit would be AT*Y1D1.
0
Exit from 254:W or 254:Q access mode. Must reside on a separate
line and must be the final sequence be sent after the final 254:W or
254:Q command.
+DR=X
Data compression reporting.
X
Mode
0
Disabled
1
Enabled
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
Mode
+DR:NONE
Data compression is not in use
+DR:V42B
Rec. V.42bis is in use in both directions
+DR:V42B RD
Rec. V.42bis is in use in receive direction only
+DR:V42B TD
Rec. V.42bis is in use in transmit directions only
+DS Options
+DS = A
+DS = A,B
+DS = A,B,C
+DS = A,B,C,D
Controls V.42bis data compression function.
A
Direction
0 No compression
1 Transmit only
2 Receive only
3
Both Directions
B
Compression_negotiation
0
Do not disconnect if V.42 is not negotiated.
1 Disconnect is V.42 is not negotiated.
C
Maximum dictionary size
512
D
Maximum string size
6 to 250 (28 default)
Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued)
Command
Action
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