UPD75238GJ

Manufacturer Part NumberUPD75238GJ
Description4 BIT SINGLE-CHIP MICROCOMPUTER
ManufacturerNEC [NEC]
UPD75238GJ datasheet
 
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FUNCTIONS
Item
On-chip memory
ROM: 32640
I/O lines
(Excluding pins dedicated to FIP)
64 lines •
Instruction cycle
Fluorescent display tube (FIP)
controller/driver
Timer/counter
5 channels
Serial interface
2 channels
Interrupt
System clock oscillator
Mask option
Operating temperature
-40 to +85 C
Operating voltage
2.7 to 6.0 V (Data held in standby mode: 2.0 to 6.0 V)
Package
94-pin plastic QFP (20
2
Function
8 bits, RAM: 1024
4 bits
Input : 16 lines
I/O
: 24 lines
Output : 24 lines
0.67 s/1.33 s/2.67 s/10.7 s (at 6.0 MHz)
0.95 s/1.91 s/3.82 s/15.3 s (at 4.19 MHz)
122 s (at 32.768 kHz)
Number of segments : 9 to 24 segments
Number of digits
: 9 to 16 digits
Dimmer function
: 8 levels
Pull-down resistors provided by mask option
Key scan interrupt generator
Basic interval timer
: Usable as watchdog timer
Timer/event counter
Clock timer
: With buzzer output function
Timer/pulse generator : With 14-bit PWM output function
Event counter
SBI or 3-wire mode
3-wire mode
Allows multiple hardware interrupts.
Detection of both edges
External interrupts : 3
Detection edge programmable (with noise
elimination)
Detection edge programmable
External test input : 1
Rising edge detection
Timer/pulse generator
Timer/event counter
Internal interrupts : 5
Basic interval timer
Serial interface #0
For key scanning
Internal test inputs: 2
Clock timer
Serial interface #1
Main system clock : 6.0 MHz, 4.19 MHz
Subsystem clock : 32.768 kHz, standard
High-voltage port : Pull-down resistor or open-drain output
Ports 4 and 5
: Pull-up resistor
Port 7
: Pull-down resistor
20 mm)
PD75238