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| 型號： | ST75C530FP-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)： | 43/84頁 |
| 文件大?。?/td> | 599K |
| 代理商： | ST75C530FP-A |
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This appendix is dedicatedto the ST75C530/540
reporting features. In the following sections the
command acknowledge process and the report
and status definitionsare explained.
VIII.1 - CommandAcknowledge and Report
VIII.1.1- Command AcknowledgeProcess
The ST75C530/540 features an acknowledge
processbased on a counterCOMACK.On power-
on reset(or INITcommand),this counter’svalueis
set to 0. Each time a command is successfully
executedby the ST75C530/540,the acknowledge
counter COMACK is incremented. This allows a
precise monitoring of the command entered and
avoidscommand collision.
Figure 16 :
CommandAcknowledgeProcess
In the case of a memory reading command (CR,
TDRC, TDRW, IDT or MR) once the command
enteredisexecuted,the reportarea isfilledandthe
acknowledge counter is incremented afterwards.
This insures that the controller will read the value
correspondingto its request.
Furthermore,the ST75C530/540 resetsthe value
of the COMSYS register and the interruption IT6
is raised.
VIII.1.2- ReportsSpecification
The report section of the Dual Port RAM is dedi-
catedtomemoryreading.In responsetoaCR,MR,
MRI, MRLO, TDRC, TDRW, IDT commands, the
value read is transferred to the report registers
COMREP[0..1].
VIII - STATUSDESCRIPTION
ASSERT
INTERRUPT
IT0
SET SYSERR
ERR_IOCD
SET SYSERR
ERR_IPRM
EXECUTE
COMMAND
CLEAR
ANSWER
END
Yes
No
BEGIN
COMSYS = 0
COMMANDEXIST
No
Yes
CLEAR
COMSYS
ASSERT
INTERRUPT
IT6
COPY ANSWER
INTO
COMREP
ASSERT
INTERRUPT
IT0
INCREMENT
COMACK
7
ST75C530- ST75C540
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| ST75C530PQFP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
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