UPD75218 NEC, UPD75218 Datasheet - Page 7

• Manufacturer Part Number: UPD75218
• Description: 4-BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

3. PIN FUNCTIONS
3.1
Note
P30 to P33
P40 to P43
P50 to P53
P60 to P63
PH0
PH1
PH2
PH3
P00
P01
P02
P03
P10
P11
P12
P13
P20
P21
P22
P23
Pin
PORT PINS
The circuit-type codes enclosed in circles indicate that the corresponding circuits have a Schmitt-triggered
input.
Input/output
Input/output
Output
output
output
output
output
output
Input/
Input/
Input/
Input/
Input/
Input
Input
Input
I/O
Dual-
function pin
T13/S12
T12/S13
T11/S14
T10/S15
INT4
INT0
INT1
INT2
BUZ
SCK
SO
TI0
–––
–––
–––
–––
–––
–––
–––
SI
4-bit input/output port (PORT2)
4-bit input port (PORT0)
4-bit input port (PORT1)
Programmable 4-bit input/ output port (PORT3).
Input/output specifiable in 1-bit units.
4-bit input/output port (PORT4).
LED direct drive capability.
4-bit input/output port (PORT5).
LED direct drive capability.
Programmable 4-bit input/output port (PORT6).
Input/output specifiable in 1-bit units.
On-chip pull-down resistor available (mask
option). Suitable for key input.
4-bit P-ch open-drain output port with high
withstand voltage and high current (PORTH).
LED direct drive capability. On-chip pull-down
resistor available (mask option).
Noise elimination function available
Noise elimination function available
Function
8-bit
I/O
Low level
(with an on-
chip pull-
down resistor)
or high
impedance.
After reset
Input
Input
Input
Input
Input
Input
Input
Input / output
circuit type
PD75218
G
B
F
B
B
E
E
E
E
V
I
Note
7