PCVisionplus
Hardware Reference
Registers
3–59
Rev 02; February 8, 2002
3.4.15.3 Input Port Strobe Polarity (INSTRBPOL) R/W
This bit defines which edge of the input strobe clocks data into the input buffer. This bit is ignored if INREGENB is
zero. This bit is cleared during power up and system reset.
INSTRBPOL
Function
0
Rising edge clocks data into buffer
1
Falling edge clocks data into buffer
3.4.15.4 Input Buffer Clear (INREGCLR) R/W
This bit clears the input port buffer. This bit forces the buffer contents to zero. This bit is cleared during power up and
system reset.
INREGCLR
Function
0
Enabled; normal operation
1
Cleared; all zeros
3.4.15.5 Input Port Interrupt Polarity (IPINTPOL) R/W
This bit defines the edge used to register an interrupt input on the parallel port. The PIOIEN bit enables the interrupt.
This bit is cleared during power up and system reset.
IPINTPOL
Function
0
Rising edge trigger
1
Falling edge trigger
3.4.15.6 Input Port Interrupt Input Status (INTINSTAT) R-O
This bit shows the current state of the interrupt pin (IO_INT) on the parallel connector. This bit is read only.
INTINSTAT
Status
0
Low input
1
High input
3.4.15.7 Input Port Strobe Input Status (STRBINSTAT) R-O
This bit reflects the current state of the strobe input pin (STROBE_I), on the input port connector.
STRBINSTAT
Status
0
STROBE_I input is low
1
STROBE_I input is high
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