UPD75218 NEC, UPD75218 Datasheet - Page 8

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

8
Note
3.2
SO
INT2
BUZ
X1
X2
XT1
XT2
RESET
V
V
V
T0 to T9
T10/S15 to
T13/S12
T14/S11,
T15/S10
S9
S0 to S8
PPO
TI0
SCK
SI
INT4
INT0
INT1
V
PRE
LOAD
DD
SS
Pin
NON-PORT PINS
The circuit-type codes enclosed in circles indicate that the corresponding circuits have a Schmitt-triggered
input.
Input/output
Input/output
Input/output
Output
Output
Input
Input
Input
Input
Input
Input
Input
Input
–––
–––
–––
–––
–––
I/O
–––
–––
Dual-
function pin
PH3 to PH0
P13
P01
P02
P03
P00
P10
P11
P12
P23
–––
–––
–––
–––
–––
–––
–––
–––
–––
–––
FIP controller/
driver output
pins.
Pull-down
resistor can
be incorpo-
rated in bit
units (mask
option).
Timer/pulse generator pulse output
External event pulse input for timer/event counter
Serial clock input/output
Serial data output or serial data input/output
Serial data input or normal input
Edge-detected vectored interrupt input (rising and falling
edge detection).
Edge-detected vectored interrupt input with noise
elimination function (detection edge selection possible).
Edge-detected testable input (rising edge detection).
Fixed frequency output (for buzzer or system clock
trimming).
Crystal/ceramic connection pin for main system clock
oscillation.
External clock input to X1 and its inverted clock input to
X2.
Crystal connection pin for subsystem clock oscillation.
External clock input to XT1. Leave XT2 open.
System reset input (low level active).
FIP controller/driver output buffer power supply.
FIP controller/driver pull-down resistor connection pin.
Positive power supply.
GND potential.
Output pins with high withstand voltage
and high current for digit output
Output pins with high withstand voltage
and high current also used for digit/seg-
ment output
Extra pins can be used as PORTH.
Output pins with high withstand voltage
and high current also used for digit/
segment output
Static output also possible.
High withstand-voltage output for segment
output. Static output also possible.
High withstand-voltage output for segment
output
Function
Low level
(with an on-
chip pull-
down
resistor ) or
high
impedance
(without a
pull-down
resistor)
High
impedance
After reset
Input
Input
Input
Input
–––
–––
–––
–––
–––
–––
–––
–––
–––
–––
–––
Input / output
circuit type
PD75218
–––
–––
–––
–––
D
G
B
F
B
B
B
B
E
B
I
I
I
Note