UPD754244 datasheet, PDF - EEWORLD Datasheet

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UPD754244: Description4-BIT SINGLE-CHIP MICROCONTROLLERS; File Size298KB，88 Pages; ManufacturerNEC ( Renesas ); Websitehttps://www2.renesas.cn/zh-cn/

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4-BIT SINGLE-CHIP MICROCONTROLLERS

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DATA SHEET

PD754144, 754244

4-BIT SINGLE-CHIP MICROCONTROLLERS

MOS INTEGRATED CIRCUIT

DESCRIPTION

The

PD754244 is a 4-bit single-chip microcontroller which incorporates the EEPROM

for key-less entry

application.

It incorporates a 16

8-bit EEPROM, a 4-Kbyte mask ROM to store software, a 128

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’s manual. Be sure to read it before designing.

PD754144, 754244 User’s Manual: U10676E

FEATURES

•

On-chip EEPROM: 16

8 bits (mapped to the data memory)

On-chip key return reset function for key-less entry

System clock oscillation circuit

•

PD754144: RC oscillator (external resistor and capacitor)

•

PD754244: Crystal/ceramic oscillator

Low-voltage operation: V

= 1.8 to 6.0 V

Timer function (4 channels)

• Basic interval timer/watchdog timer: 1 channel

• 8-bit timer counter

: 3 channels

On-chip memory

• Program memory (ROM)

4096

8 bits

• Data memory (static RAM)

128

4 bits

Instruction execution time variable function suited for power saving.

•

PD754144:

4, 8, 16, 64

s (at fcc = 1.0-MHz operation)

•

PD754244:

0.95, 1.91, 3.81, 15.3

s (at fx = 4.19-MHz operation)

0.67, 1.33, 2.67, 10.7

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

µPD754244

(crystal/ceramic oscillation: f

)

mean the

PD754144.

The

PD754144 and

PD754244 differ in the notation of their RC oscillation: whenever f

(RC oscillation notation

for

PD754244) is described, f

should be substituted for the

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.

1995

PD754144, 754244

CONTENTS

1. PIN CONFIGURATION (TOP VIEW) .................................................................................................... 6

2. BLOCK DIAGRAM ................................................................................................................................ 8

3. PIN FUNCTION ..................................................................................................................................... 9

3.1 Port Pins ...................................................................................................................................... 9

3.2 Non-port Pins ............................................................................................................................ 10

3.3 Pin Input/Output Circuits ......................................................................................................... 11

3.4 Recommended Connection of Unused Pins .......................................................................... 12

4. SWITCHING FUNCTION BETWEEN MK I MODE AND MK II MODE ............................................... 13

4.1 Difference between Mk I and Mk II Modes .............................................................................. 13

4.2 Setting Method of Stack Bank Select Register (SBS) ........................................................... 14

5. MEMORY CONFIGURATION ............................................................................................................. 15

6. EEPROM .............................................................................................................................................18

7. PERIPHERAL HARDWARE FUNCTIONS ......................................................................................... 19

7.1 Digital Input/Output Ports ........................................................................................................ 19

7.2 Clock Generator ........................................................................................................................19

7.3 Basic Interval Timer/Watchdog Timer ..................................................................................... 22

7.4 Timer Counter ........................................................................................................................... 23

7.5 Programmable Threshold Port (Analog Input Port) ............................................................... 27

7.6 Bit Sequential Buffer ....... 16 Bits ............................................................................................ 28

8. INTERRUPT FUNCTION AND TEST FUNCTION .............................................................................. 29

9. STANDBY FUNCTION ........................................................................................................................31

10. RESET FUNCTION ............................................................................................................................. 32

10.1 Configuration and Operation Status of RESET Function ..................................................... 32

10.2 Watchdog Flag (WDF), Key Return Flag (KRF) ...................................................................... 36

11. MASK OPTION ...................................................................................................................................38

12. INSTRUCTION SETS ..........................................................................................................................39

13. ELECTRICAL SPECIFICATIONS ...................................................................................................... 48

13.1

PD754144 ................................................................................................................................. 48

13.2

PD754244 ................................................................................................................................. 56

14. CHARACTERISTICS CURVES (REFERENCE VALUES) ................................................................. 67

14.1

PD754144 ................................................................................................................................. 67

14.2

PD754244 ................................................................................................................................. 69

UPD754244 Related Products

	UPD754244	UPD754244GS	UPD754144GS	UPD754144
Description	4-BIT SINGLE-CHIP MICROCONTROLLERS	4-BIT SINGLE-CHIP MICROCONTROLLERS	4-BIT SINGLE-CHIP MICROCONTROLLERS	4-BIT SINGLE-CHIP MICROCONTROLLERS

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