Casio 130CR Service Manual page 14

(1) Port pins (2/2)
Pin Name I/O
P40 to P47 I/O Port 4
8-bit I/O port
Input/output can be specified in 8-bit units.
If used as an input port, an on-chip pull-up resistor can
be connected by setting software.
The test input flag (KRIF) is set to 1 by falling edge
detection.
P50 to P57 I/O Port 5
8-bit I/O port
LEDs can be driven directly.
Input/output can be specified in 1-bit units.
If used as an input port, an on-chip pull-up resistor can
be connected by setting software.
P60 I/O Port 6
P61 8-bit I/O port
P62 Input/output can be
P63 specified in 1-bit units.
P64
P65
P66
P67
P70 I/O Port 7
3-bit I/O port
P71 Input/output can be specified in 1-bit units.
If used as an input port, an on-chip pull-up resistor can
P72 be connected by setting software.
P120 to P127 I/O Port 12
8-bit I/O port
Input/output can be specified in 1-bit units.
If used as an input port, an on-chip pull-up resistor can
be connected by setting software.
P130 to P131 I/O Port 13
2-bit I/O port
Input/output can be specified in 1-bit units.
If used as an input port, an on-chip pull-up resistor can
be connected by setting software.
Function
N-ch open-drain I/O port
On-chip pull-up resistors can
be specified by mask option.
(Mask ROM version only).
LEDs can be driven directly.
If used as an input port, an on-
chip pull-up resistor can be
connected by setting software.
— 12 —
After Reset Alternate Function
Input AD0 to AD7
Input A8 to A15
Input —
RD
WR
WAIT
ASTB
Input SI2/RxD0
SO2/TxD0
SCK2/ASCK
Input RTP0 to RTP7
Input ANO0 to ANO1