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UPD754244 Datasheet

  • UPD754244

  • 4-BIT SINGLE-CHIP MICROCONTROLLERS

  • 88頁

  • NEC   NEC

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DATA SHEET
碌
PD754144, 754244
4-BIT SINGLE-CHIP MICROCONTROLLERS
MOS INTEGRATED CIRCUIT
DESCRIPTION
The
碌
PD754244 is a 4-bit single-chip microcontroller which incorporates the EEPROM
TM
for key-less entry
application.
It incorporates a 16
脳
8-bit EEPROM, a 4-Kbyte mask ROM to store software, a 128
脳
4-bit RAM to store the
processing data, a processing CPU, and a carrier generator which easily outputs waveforms for infrared remote
controller.
The details of functions are described in the following user鈥檚 manual. Be sure to read it before designing.
碌
PD754144, 754244 User鈥檚 Manual: U10676E
FEATURES
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
On-chip EEPROM: 16
脳
8 bits (mapped to the data memory)
On-chip key return reset function for key-less entry
System clock oscillation circuit
鈥?/div>
碌
PD754144: RC oscillator (external resistor and capacitor)
鈥?/div>
碌
PD754244: Crystal/ceramic oscillator
Low-voltage operation: V
DD
= 1.8 to 6.0 V
Timer function (4 channels)
鈥?Basic interval timer/watchdog timer: 1 channel
鈥?8-bit timer counter
: 3 channels
On-chip memory
鈥?Program memory (ROM)
4096
脳
8 bits
鈥?Data memory (static RAM)
128
脳
4 bits
Instruction execution time variable function suited for power saving.
鈥?/div>
碌
PD754144:
4, 8, 16, 64
碌
s (at fcc = 1.0-MHz operation)
鈥?/div>
碌
PD754244:
0.95, 1.91, 3.81, 15.3
碌
s (at fx = 4.19-MHz operation)
0.67, 1.33, 2.67, 10.7
碌
s (at fx = 6.0-MHz operation)
APPLICATIONS
Automotive appliances such as key-less entry, compact data carrier, etc.
Unless contextually excluded, references in this data sheet to the
碌PD754244
(crystal/ceramic oscillation: f
X
)
mean the
碌
PD754144.
The
碌
PD754144 and
碌
PD754244 differ in the notation of their RC oscillation: whenever f
X
(RC oscillation notation
for
碌
PD754244) is described, f
CC
should be substituted for the
碌
PD754144.
The information in this document is subject to change without notice.
Document No. U10040EJ2V0DS00
Date Published July 1998 N CP(K)
Printed in Japan
The mark
shows major revised points.
漏
1995

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