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MSM80C154S/83C154S/85C154HVS
72
4.4.2.6 Interrupt priority register (IP)
IP 0B8H PCT — PT2 PS PT1 PX1 PT0 PX0
Name Address
MSB LSB
76543210
Bit location Flag Function
IP.0
IP.1
IP.2
IP.3
IP.4
IP.5
IP.6
IP.7
PX0
PT0
PX1
PT1
PS
PT2
—
PCT
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).