UPD784044 Datasheet, PDF (5/90 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD784044(A), 784046(A)
CONTENTS
1. DIFFERENCES BETWEEN µPD784044(A) AND 784046(A) ............................................................ 7
2. PIN CONFIGURATION (Top View) ..................................................................................................... 8
3. SYSTEM CONFIGURATION EXAMPLE ...........................................................................................10
4. BLOCK DIAGRAM ............................................................................................................................. 11
5. PIN FUNCTIONS ................................................................................................................................12
5.1 Port Pins .................................................................................................................................................... 12
5.2 Pins Other Than Port Pins ...................................................................................................................... 14
5.3 I/O Circuits of Pins and Processing of Unused Pins .......................................................................... 16
6. CPU ARCHITECTURE .......................................................................................................................18
6.1 Memory Space .......................................................................................................................................... 18
6.2 CPU Registers ........................................................................................................................................... 21
6.2.1 General-purpose registers ............................................................................................................. 21
6.2.2 Control registers ............................................................................................................................. 22
6.2.3 Special function registers (SFRs) .................................................................................................. 23
7. PERIPHERAL HARDWARE FUNCTIONS ........................................................................................29
7.1 Ports ........................................................................................................................................................... 29
7.2 Clock Generation Circuit ......................................................................................................................... 30
7.3 Real-Time Output Port ............................................................................................................................. 32
7.4 Timer/Counter ........................................................................................................................................... 32
7.5 A/D Converter ........................................................................................................................................... 35
7.6 Serial Interface .......................................................................................................................................... 36
7.6.1 Asynchronous serial interface/3-wire serial I/O (UART/IOE) ....................................................... 37
7.7 Edge Detection Circuit ............................................................................................................................ 39
7.8 Watchdog Timer ........................................................................................................................................ 39
8. INTERRUPT FUNCTION....................................................................................................................40
8.1 Interrupt Source ....................................................................................................................................... 40
8.2 Vectored Interrupt .................................................................................................................................... 42
8.3 Context Switching .................................................................................................................................... 43
8.4 Macro Service ........................................................................................................................................... 44
9. LOCAL BUS INTERFACE .................................................................................................................47
9.1 Memory Expansion .................................................................................................................................. 48
9.2 Memory Space .......................................................................................................................................... 49
9.3 Programmable Wait .................................................................................................................................. 49
9.4 Bus Sizing Function ................................................................................................................................. 49
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