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UPD75237GJ



NEC 로고
NEC
D75237GJ 데이터시트, 핀배열, 회로
www.DataSheet4U.com
DATA SHEET
MOS INTEGRATED CIRCUIT
µPD75237
4-BIT SINGLE-CHIP MICROCOMPUTER
DESCRIPTION
The µPD75237 is a microcomputer with a CPU capable of 1-, 4-, and 8-bit-wise data processing, a ROM, a RAM,
I/O ports, a fluorescent display tube (FIP ®) controller/driver, A/D converters, a watch timer, a timer/pulse generator
capable of outputting 14-bit PWM, a serial interface and a vectored interrupt function integrated on a single-chip.
The µPD75237 has the more improved peripheral functions including the RAM capacity, FIP controller/driver
display capabilities, I/O ports, A/D converter and serial interface than those of the µPD75217.
The µPD75237 is most suited for advanced and popular VCR timer and tuner applications, single-chip configu-
rations of system computers, advanced CD players and advanced microwave ovens.
The µPD75P238 PROM product and various types of development tools (IE-75001-R, assemblers and others) are
available for evaluation in system development or small-volume production.
FEATURES
q Built-in, large-capacity ROM and RAM
• Program memory (ROM): 24K × 8
• Data memory (RAM): 1K × 4
q I/O port: 64 ports (except FIP dedicated pins)
q Minimum instruction execution time: 0.67 µs (when
operated at 6.0 MHz)
q Instruction execution time varying function to achieve
a wide range of power supply voltages
q Built-in programmable FIP controller/driver
• Number of segments: 9 to 24
• Number of digits: 9 to 16
q 8-bit A/D converter: 8 channels
q Powerful timer/counter function: 5 channels
q 8-bit serial interface: 2 channels
q Interrupt function with importance attached to appli-
cations
q Product with built-in PROM: µPD75P238
ORDERING INFORMATION
Ordering Code
Package
Quality Grade
µPD75237GJ-×××-5BG
94-pin plastic QFP (20 × 20 mm)
Standard
Please refer to “Quality grade on NEC Semiconductor Devices” (Document number IEI-1209) published by
NEC Corporation to know the specification of quality grade on the devices and its recommended applications.
Document No. IC-2807A
(O. D. No. IC-8009A)
Date Published March 1993 P
Printed in Japan
The information in this document is subject to change without notice.
The mark 5 shows major revised points.
© NEC Corporation 1991


D75237GJ 데이터시트, 핀배열, 회로
µPD75237
www.DLatIaSSThOeeFt4µUP.Dco7m5237 FUNCTIONS
Item
Built-in memory capacity
I/O line
( )except FIP
dedicated pins
Instruction cycle
Fluorescent display
tube (FIP)
controller/driver
Timer/counter
Serial interface
Interrupt
System clock oscillator
Mask option
Operating temperature
range
Operating voltage
Package
Function
ROM: 24448 × 8 bits, RAM: 1024 × 4bits
64 lines
q Input pin
: 16
q Input/output pin : 24
q Output pin
: 24
q 0.67 µs/1.33 µs/2.67 µs/10.7 µs (when operated at 6.0 MHz)
q 0.95 µs/1.91 µs/3.82 µs/15.3 µs (when operated at 4.19 MHz)
q 122 µs (when operated at 32.768 kHz)
q Number of segments : 9 to 24
q Number of digits
: 9 to 16
q Dimmer function
: 8 levels
q Pull-down resistor mask option
q Key scan interrupt generation enabled
5 channels
q Basic interval timer : Watchdog timer applicable
q Timer/event counter
q Watch timer
: Buzzer output enabled
q Timer/pulse generator : 14-bit PWM output enabled
q Event counter
q SBI/3-wire type
2 channels q 3-wire type
q Multi-interrupt enabled by hardware
q Both-edge detection
q External interrupt: 3 interrupts q Detected edge programmable (with noise
remove function)
q Detected edge programmable
q External test input: 1 input
q Rising edge detection
q Timer/pulse generator
q Timer/event counter
q Internal interrupt: 5 interrupts q Basic interval timer
q Serial interface #0
q Key scan interrupt
q Internal test input: 2 inputs
q Clock timer
q Serial interface #1
q Main system clock : 6.0 MHz, 4.19 MHz
q Subsystem clock : 32.768 kHz standard
q High withstand voltage port : Pull-down resistor or open-drain output
q Ports 4 and 5
: Pull-up resistors
q Port 7
: Pull-down resistor
–40 to +85 °C
2.7 to 6.0 V (standby data hold: 2.0 to 6.0 V)
94-pin plastic QFP (20 × 20 mm)
2




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