Casio 130CR Service Manual

— 11 —
5-1-3. Pin Function
(1) Port pins (1/2)
Pin Name
P00
P01
P02
P03
P04
P05
P07
Note 1
P10 to P17
P20
P21
P22
P23
P24
P25
P26
P27
P30
P31
P32
P33
P34
P35
P36
P37
I/O
Input
I/O
Input
I/O
I/O
I/O
Function
Port 0
7-bit I/O port
Port 1
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.
Note 2
Port 2
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.
Port 3
8-bit I/O port
Input/output can be specified in 1-it units.
If used as an input port, an on-chip pull-up resistor can
be connected by setting software.
After Reset
Input
Input
Input
Input
Input
Input
Alternate Function
INTP0/TI00
INTP1/TI01
INTP2
INTP3
INTP4
INTP5
XT1
ANI0 to ANI7
SI1
SO1
SCK1
STB/TxD1
BUSY/RxD1
SI0/SB0
SO0/SB1
SCK0
TO0
TO1
TO2
TI1
TI2
PCL
BUZ
—
Input only
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.
Input only
Notes
1. When the P07/XT1 pin is used as an input port, set bit 6 (FRC) of the processor clock control register
(PCC) to 1 (do not use the feedback resistor incorporated in the subsystem clock oscillator).
2. When pins P10/ANI0 to P17/ANI7 are used as an analog input of the A/D converter, set port 1 to the
input mode. In this case, any connected on-chip pull-up resistors are automatically disabled.

Casio 130CR Specifications

General

Brand	Casio
Model	130CR
Category	Cash Register
Language	English