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MSM80C154S/83C154S
Interrupt priority register (IP)
NAME
ADDRESS
IP
0B8H
BIT LOCATION
FLAG
IP.0
PX0
IP.1
PT0
IP.2
PX1
IP.3
PT1
IP.4
PS
IP.5
PT2
IP.6
—
IP.7
PCT
274
MSB
7
6
5
PCT
—
PT2
Interrupt priority bit for external interrupt 0.
Priority is assigned when bit is "1".
Interrupt priority bit for timer interrupt 0.
Priority is assigned when bit is "1".
Interrupt priority bit for external interrupt 1.
Priority is assigned when bit is "1".
Interrupt priority bit for timer interrupt 1.
Priority is assigned when bit is "1".
Interrupt priority bit for serial port.
Priority is assigned when bit is "1".
Interrupt priority bit for timer interrupt 2.
Priority is assigned when bit is "1".
Reserved bit. The output data is "1" if the bit is read.
Priority interrupt circuit control bit.
The priority register contents are valid and priority assigned interrupts can be
processed when this bit is "0". When the bit is "1", the priority interrupt circuit is
stopped, and interrupts can only be controlled by the interrupt enable register (IE).
¡ Semiconductor
4
3
2
PS
PT1
PX1
FUNCTION
LSB
1
0
PT0
PX0
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