參數(shù)資料
型號： MC68HC681P
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PDIP40
封裝： PLASTIC, DIP-40
文件頁數(shù)： 37/88頁
文件大?。?/td> 461K
代理商： MC68HC681P
Programming and Register Descriptions
4-12
MC68HC681 USER’S MANUAL
MOTOROLA
4
All Bits
0 = This interrupt source is not active
1 = This interrupt source is active
All Bits
0 = Mask this interrupt source
1 = Allow this interrupt source to assert IRQ
* Bit seven has no external pin. Upon reading the input port, bit seven will always be
read as a one
Bit six has no external pin. Upon reading the input port, bit six will reflect the current
logic level of IACK
Interrupt Status Register (ISR)
76543210
INPUT PORT
CHANGE
DELTA
BREAK B
RXRDYB/
FFULLB
TXRDYB
COUNTER/
TIMER
READY
DELTA
BREAK A
RXRDYA/
FFULLA
TXRDYA
Interrupt Mask Register (IMR)
76543210
INPUT PORT
CHANGE
DELTA
BREAK B
RXRDYB/
FFULLB
TXRDYB
COUNTER/
TIMER
READY
DELTA
BREAK A
RXRDYA/
FFULLA
TXRDYA
Counter/Timer Upper Register (CTUR)
76543210
C/T[15]
C/T[14]
C/T[13]
C/T[12]
C/T[11]
C/T[10]
C/T[9]
C/T[8]
Counter/Timer Lower Register (CTLR)
76543210
C/T[7]
C/T[6]
C/T[5]
C/T[4]
C/T[3]
C/T[2]
C/T[1]
C/T[0]
Interrupt Vector Register (IVR)
76543210
IVR[7]
IVR[6]
IVR[5]
IVR[4]
IVR[3]
IVR[2]
IVR[1]
IVR[0]
Input Port
76543210
*
IP5
IP4
IP3
IP2
IP1
IP0
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