UPD78320 Datasheet, PDF (10/88 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78320, 78322
CONTENTS
1. LIST OF PIN FUNCTIONS ..................................................................................................................... 12
1.1 PORT PINS ...................................................................................................................................................... 12
1.2 NON-PORT PINS ............................................................................................................................................. 13
1.3 PIN INPUT/OUTPUT CIRCUITS AND RECOMMENDED CONNECTION OF UNUSED PINS ................... 15
2. CPU ARCHITECTURE ............................................................................................................................ 17
2.1 MEMORY SPACE ............................................................................................................................................ 17
2.2 PROCESSOR REGISTERS ............................................................................................................................ 20
2.2.1 Control Registers ........................................................................................................................... 21
2.2.2 General Registers ........................................................................................................................... 23
2.2.3 Special Function Registers (SFR) ................................................................................................ 25
2.3 DATA MEMORY ADDRESSING ..................................................................................................................... 30
2.3.1 General Register Addressing ....................................................................................................... 30
2.3.2 Short Direct Addressing ................................................................................................................ 30
2.3.3 Special Function Register (SFR) Addressing ............................................................................ 30
3. BLOCK FUNCTIONS .............................................................................................................................. 31
3.1 BUS CONTROL UNIT (BCU) .......................................................................................................................... 31
3.2 EXECUTION UNIT (EXU) ................................................................................................................................ 31
3.3 ROM/RAM ........................................................................................................................................................ 31
3.4 INTERRUPT CONTROLLER .......................................................................................................................... 31
3.5 PORT FUNCTIONS ......................................................................................................................................... 32
3.6 CLOCK GENERATOR .................................................................................................................................... 33
3.7 REALTIME PULSE UNIT (RPU) ..................................................................................................................... 35
3.7.1 Configuration .................................................................................................................................. 35
3.7.2 Realtime Output Function ............................................................................................................. 37
3.8 A/D CONVERTER ........................................................................................................................................... 38
3.9 SERIAL INTERFACE ...................................................................................................................................... 38
3.10 WATCHDOG TIMER ....................................................................................................................................... 41
4. INTERRUPT FUNCTIONS ...................................................................................................................... 42
4.1 OVERVIEW ...................................................................................................................................................... 42
4.2 MACRO SERVICE ........................................................................................................................................... 44
4.3 CONTEXT SWITCHING FUNCTION .............................................................................................................. 45
4.3.1 Context Switching Function by Interrupt Request .................................................................... 45
4.3.2 Context Switching Function by BRKCS Instruction ................................................................. 46
5. STANDBY FUNCTIONS ......................................................................................................................... 47
6. EXTERNAL DEVICE EXPANSION FUNCTION .................................................................................... 48
7. OPERATION AFTER RESET ................................................................................................................. 49
8. INSTRUCTION SET ................................................................................................................................ 50
9. ELECTRICAL SPECIFICATIONS .......................................................................................................... 64
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