UPD75238GJ NEC [NEC], UPD75238GJ Datasheet - Page 2

• Manufacturer Part Number: UPD75238GJ
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC [NEC]

2
FUNCTIONS
On-chip memory
I/O lines
(Excluding pins dedicated to FIP)
Instruction cycle
Fluorescent display tube (FIP)
controller/driver
Timer/counter
Serial interface
Interrupt
System clock oscillator
Mask option
Operating temperature
Operating voltage
Package
Item
ROM: 32640
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5 channels
2 channels
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-40 to +85 C
2.7 to 6.0 V (Data held in standby mode: 2.0 to 6.0 V)
94-pin plastic QFP (20
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
Dimmer function
Pull-down resistors provided by mask option
Key scan interrupt generator
Allows multiple hardware interrupts.
External interrupts : 3
External test input : 1
Internal interrupts : 5
Internal test inputs: 2
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
Port 7
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Input : 16 lines
I/O
Output : 24 lines
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8 bits, RAM: 1024
Basic interval timer
Timer/event counter
Clock timer
Timer/pulse generator : With 14-bit PWM output function
Event counter
SBI or 3-wire mode
3-wire mode
: 24 lines
: Pull-up resistor
: Pull-down resistor
20 mm)
: 9 to 16 digits
: 8 levels
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Detection of both edges
Detection edge programmable (with noise
elimination)
Detection edge programmable
Rising edge detection
Timer/pulse generator
Timer/event counter
Basic interval timer
Serial interface #0
For key scanning
Clock timer
Serial interface #1
Function
4 bits
: Usable as watchdog timer
: With buzzer output function
PD75238