參數(shù)資料
型號： ST75C540FP-A
廠商： 意法半導(dǎo)體
英文描述： SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHONY,MODEM, FAXOVERINTERNET& POTSLINES
中文描述： 超級綜合DEVICESWITH數(shù)字信號處理器，模擬前端
文件頁數(shù)： 38/84頁
文件大小： 599K
代理商： ST75C540FP-A
SETGN
Opcode:
Set Output Gain
SETGN
02
0
0
0
0
0
0
1
0
Synopsis
SETGN is a command which sets the scaling factor of the transmit samples. It is used for
settingthe outputlevel or forsettingthelevelof thetonegenerators.The gainvalueis given
in the form of a 2’scomplement 16-bit value.
Parameter
Field
GAIN_L
GAIN_H
Byte
1
2
Pos.
7..0
7..0
Value
range FF*
range 7F*
Definition
Low byte of the 16-bit gain value
High byte of the 16-bit gain value
Example
Gain (dB)
Gain (Hex)
7FFF
7214
65AC
5A9D
50C3
Gain (dB)
-5
-6
-7
-8
-9
Gain (Hex)
47FA
4026
392C
32F5
2D6A
Gain (dB)
-10
-11
-12
-13
-14
Gain (Hex)
287A
2413
2026
1CA7
198A
0
-1
-2
-3
-4
The multiplication factoris : 10
(-1/20)
= 0.89125 for 1dB step.
SLEEP
Opcode:
Turn to Sleep Mode
SLEEP
03
0
0
0
0
0
0
1
1
Synopsis
Parameter
SLEEPis used to force the ST75C530/540to turn to low power mode.
Non parametriccommand.
Note :
When receivingthis commandthe ST75C530/540will stopprocessing and socannot havethe regularhandshake protocol.
It does not increment the COMACK,neither generatean Interrupt.
STOP
Opcode:
FAX Stop Transmitter
STOP
25
0
0
1
0
0
1
0
1
Synopsis
STOP is used, in FAX Modes, to force the ST75C530/540 to turn off the transmitter in
accordancewith the correspondingITU-TV.33/V.17/V.29/V.27recommendation.
Non parametriccommand.
When receiving this command the ST75C530/540 will stop sending regular Data. This command must be preceded by a
XMIT
Stop command.The ST75C530/540will waituntil all the transmitbuffers are sent before starting the Stopsequence.
Parameter
Note :
SYNC
Opcode:
FAX Synchronizethe Receiver
SYNC
26
0
0
1
0
0
1
1
0
Synopsis
SYNC is used, in FAX Modes, to force the ST75C530/540 to Start/Stop the receiver in
accordancewith the correspondingITU-TV.33/V.17/V.29/V.27recommendation.Assoon as
the ST75C530/540receivesthe
SYNC
Startcommand it sets its receiver to detectthe FAX
synchronizationsignal.This command is the equivalent
HSHK
commandfor the receiver.
Parameters
Field
Byte
1
Pos.
0
Value
0*
1
Definition
RX_SYNC
Stop receiver
Start receiver synchronization
VII - COMMAND SET DESCRIPTION
(continued)
ST75C530 - ST75C540
38/84
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