UPD754264 datasheet(3/68 Pages) NEC

3 / 68 page

µPD754264

CONTENTS

PIN CONFIGURATION (TOP VIEW) ................................................................................................... 5

BLOCK DIAGRAM ............................................................................................................................... 6

PIN FUNCTION .................................................................................................................................... 7

3.1

Port Pins ..................................................................................................................................... 7

3.2

Non-port Pins ............................................................................................................................. 8

3.3

Pin Input/Output Circuits .......................................................................................................... 9

3.4

Recommended Connection of Unused Pins ......................................................................... 10

SWITCHING FUNCTION BETWEEN Mk I MODE AND Mk II MODE ............................................... 11

4.1

Difference between Mk I and Mk II Modes ............................................................................. 11

4.2

Setting Method of Stack Bank Select Register (SBS) .......................................................... 12

MEMORY CONFIGURATION ............................................................................................................ 13

EEPROM ............................................................................................................................................ 16

PERIPHERAL HARDWARE FUNCTIONS ........................................................................................ 17

7.1

Digital Input/Output Ports ....................................................................................................... 17

7.2

Clock Generator ....................................................................................................................... 17

7.3

Basic Interval Timer/Watchdog Timer ................................................................................... 19

7.4

Timer Counter .......................................................................................................................... 20

7.5

A/D Converter ........................................................................................................................... 24

7.6

Bit Sequential Buffer ............................................................................................................... 25

INTERRUPT FUNCTION AND TEST FUNCTION ............................................................................. 26

STANDBY FUNCTION ....................................................................................................................... 28

10. RESET FUNCTION ............................................................................................................................ 29

10.1 Configuration and Operation Status of RESET Function .................................................... 29

10.2 Watchdog Flag (WDF), Key Return Flag (KRF) ..................................................................... 33

11. MASK OPTION .................................................................................................................................. 35

12. INSTRUCTION SETS ........................................................................................................................ 36

13. ELECTRICAL SPECIFICATIONS ..................................................................................................... 45

14. CHARACTERISTICS CURVES (REFERENCE VALUES) ................................................................ 55

15. PACKAGE DRAWINGS ..................................................................................................................... 58

16. RECOMMENDED SOLDERING CONDITIONS................................................................................. 59

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