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UPD754264 Datasheet(PDF) 3 Page - NEC

Part # UPD754264
Description  4-BIT SINGLE-CHIP MICROCONTROLLERS
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD754264 Datasheet(HTML) 3 Page - NEC

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µPD754264
CONTENTS
1.
PIN CONFIGURATION (TOP VIEW) ................................................................................................... 5
2.
BLOCK DIAGRAM ............................................................................................................................... 6
3.
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
4.
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
5.
MEMORY CONFIGURATION ............................................................................................................ 13
6.
EEPROM ............................................................................................................................................ 16
7.
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
8.
INTERRUPT FUNCTION AND TEST FUNCTION ............................................................................. 26
9.
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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