參數(shù)資料
型號： MC68HC705V8
廠商： Motorola, Inc.
英文描述： 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述： 8位微控制器單元（MCU）。（8位微控制器）
文件頁數(shù)： 16/28頁
文件大?。?/td> 220K
代理商： MC68HC705V8
MOTOROLA
16
AN1224/D
Figure 7a. MDLC Interrupt Service Routine (cont.’d)
DOES "DATA"
MATCH I.D. #1
NO
YES
CLEAR INDEX
REGISTER
DOES "DATA"
MATCH I.D. #2
NO
YES
INCREMENT INDEX
REGISTER
DOES "DATA"
MATCH I.D. #3
NO
YES
INCREMENT INDEX
REGISTER
DOES "DATA"
MATCH I.D. #4
NO
INCREMENT INDEX
REGISTER
YES
B
D
MDLC INTERRUPT
OCCURS
RETRIEVE
PRIORITY/TYPE BYTE OF
RECEIVED MESSAGE
FROM "rxdata0"
STORE NUMBER OF
RECEIVED DATA
BYTES INTO RAM
LOCATION "ncount"
IS MESSAGE
PHYSICALLY
ADDRESSED
NO
YES
RETRIEVE TARGET
ADDRESS BYTE OF
RECEIVED MESSAGE
FROM "rxdata1"
DOES IT
MATCH MY
ADDRESS
YES
STORE NUMBER OF
RECEIVED DATA BYTES
IN INDEX REGISTER
NO
IS THIS A
RECEIVE
INTERRUPT
NO
YES
A
B
E
C
DECREMENT INDEX
REGISTER
LOAD SOURCE
ADDRESS OF
MESSAGE INTO RAM
LOCATION "nsource"
USING INDEXED
ADDRESSING, LOAD
BYTE OF MESSAGE
STORED IN "rxdata3,X"
INTO "nbuff,X"
IS INDEX
REGISTER =0
NO
YES
WRITE ACCUMULATOR
DATA TO MRSR TO
RELEASE RECEIVE
BUFFER TO MDLC
IS A TRANSMIT
INTERRUPT
PENDING
YES
NO
RETURN FROM
INTERRUPT
A
C
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