UPD75518 NEC, UPD75518 Datasheet - Page 8

• Manufacturer Part Number: UPD75518
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

8
1.1 PORT PINS (2/2)
Note The circuits enclosed in circles have a Schmitt-triggered input.
P100-P103
P110-P113
P120-P123
P130-P133
P140-P143
P150-P153
Pin name
P90-P93
P80
P81
P82
P83
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I
AN4-AN7
Also
used as
SCK1
PPO
SO1
SI1
–
–
–
–
–
–
4-bit input port (Port 8).
4-bit I/O port (Port 9).
A pull-down resistor can be provided bit by bit
(mask option).
4-bit I/O port (Port 10)
4-bit I/O port (Port 11)
N-ch open-drain, 4-bit I/O port (Port 12).
Pull-up resistors can be provided bit by bit
(mask option).
Withstand voltage is 10 V in open-drain mode.
N-ch open-drain, 4-bit I/O port (Port 13).
Pull-up resistors can be provided bit by bit
(mask option).
Withstand voltage is 10 V in open-drain mode.
N-ch open-drain, 4-bit I/O port (Port 14).
Pull-up resistors can be provided bit by bit
(mask option).
Withstand voltage is 10 V in open-drain mode.
4-bit input port (Port 15)
Function
8-bit I/O
Input
Low level (when
a pull-down
resistor is
provided) or
high impedance
Input
Input
High level
(when a pull-up
resistor is
provided) or
high impedance
High level
(when a pull-up
resistor is
provided) or
high impedance
High level
(when a pull-up
resistor is
provided) or
high impedance
Input
When reset
PD75518(A)
I/O
circuit
type
Y - A
Note 1
M
M
M
E
F
E
B
V
E
E