Datasheet

I/O Ports with Key Wake-up
Key Wake-up and port Registers
MC68HC912DT128A — Rev 4.0 Technical Data
MOTOROLA I/O Ports with Key Wake-up 153
Read and write anytime. It is best to clear the flags after initializing this
register because changing the polarity of a bit can cause the associated
flag to become set.
KWPJ[7:0] — Key Wake-up Port J Polarity Selects
0 = Falling edge on the associated port J pin sets the associated
flag bit in the KWIFJ register and a resistive pull-up device is
connected to associated port J input pin.
1 = Rising edge on the associated port J pin sets the associated
flag bit in the KWIFJ register and a resistive pull-down device
is connected to associated port J input pin.
Read and write anytime. It is best to clear the flags after initializing this
register because changing the polarity of a bit can cause the associated
flag to become set.
KWPH[7:0] — Key Wake-up Port H Polarity Selects
0 = Falling edge on the associated port H pin sets the associated
flag bit in the KWIFH register and a resistive pull-up device is
connected to associated port H input pin.
1 = Rising edge on the associated port H pin sets the associated
flag bit in the KWIFH register and a resistive pull-down device
is connected to associated port H input pin.
KWPJ — Key Wake-up Port J Polarity Register $0030
Bit 7654321Bit 0
KWPJ7 KWPJ6 KWPJ5 KWPJ4 KWPJ3 KWPJ2 KWPJ1 KWPJ0
RESET:00000000
KWPH — Key Wake-up Port H Polarity Register $0031
Bit 7654321Bit 0
KWPH7 KWPH6 KWPH5 KWPH4 KWPH3 KWPH2 KWPH1 KWPH0
RESET: 00000000
Frees
cale Semiconductor,
I
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