UPD78323 NEC, UPD78323 Datasheet - Page 9

• Manufacturer Part Number: UPD78323
• Description: 16/8-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

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LIST OF PIN FUNCTIONS ..................................................................................................................... 11
1.1
1.2
1.3
CPU ARCHITECTURE ............................................................................................................................ 16
2.1
2.2
2.3
BLOCK FUNCTIONS .............................................................................................................................. 30
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10 WATCHDOG TIMER ....................................................................................................................................... 40
INTERRUPT FUNCTIONS ...................................................................................................................... 41
4.1
4.2
4.3
STANDBY FUNCTIONS ......................................................................................................................... 46
EXTERNAL DEVICE EXPANSION FUNCTION .................................................................................... 47
OPERATION AFTER RESET ................................................................................................................. 48
INSTRUCTION SET ................................................................................................................................ 49
ELECTRICAL SPECIFICATIONS .......................................................................................................... 63
PORT PINS ...................................................................................................................................................... 11
PINS OTHER THAN PORTS .......................................................................................................................... 12
PIN INPUT/OUTPUT CIRCUITS AND RECOMMENDED CONNECTION OF UNUSED PINS ................... 14
MEMORY SPACE ............................................................................................................................................ 16
PROCESSOR REGISTERS ............................................................................................................................ 19
2.2.1
2.2.2
2.2.3
DATA MEMORY ADDRESSING ..................................................................................................................... 29
2.3.1
2.3.2
2.3.3
BUS CONTROL UNIT (BCU) .......................................................................................................................... 30
EXECUTION UNIT (EXU) ................................................................................................................................ 30
ROM/RAM ........................................................................................................................................................ 30
INTERRUPT CONTROLLER .......................................................................................................................... 30
PORT FUNCTIONS ......................................................................................................................................... 31
CLOCK GENERATOR .................................................................................................................................... 32
REALTIME PULSE UNIT (RPU) ..................................................................................................................... 34
3.7.1
3.7.2
A/D CONVERTER ........................................................................................................................................... 37
SERIAL INTERFACE ...................................................................................................................................... 37
OVERVIEW ...................................................................................................................................................... 41
MACRO SERVICE ........................................................................................................................................... 42
CONTEXT SWITCHING FUNCTION .............................................................................................................. 44
4.3.1
4.3.2
Control Registers ........................................................................................................................... 20
General Registers ........................................................................................................................... 22
Special Function Registers (SFR) ................................................................................................ 24
General Register Addressing ....................................................................................................... 29
Short Direct Addressing ................................................................................................................ 29
Special Function Register (SFR) Addressing ............................................................................ 29
Configuration .................................................................................................................................. 34
Realtime Output Function ............................................................................................................. 36
Context Switching Function at Interrupt Request ..................................................................... 44
Context Switching Function by BRKCS Instruction ................................................................. 45
CONTENTS
PD78323, 78324
9