UPD784224 Datasheet, PDF (5/92 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCONTROLLERS

µPD784224, 784225, 784224Y, 784225Y
CONTENTS
1. DIFFERENCES AMONG MODELS IN µPD784225, 784225Y SUBSERIES .............................. 7
2. MAJOR DIFFERENCES BETWEEN µPD784216Y SUBSERIES AND
µPD780058Y SUBSERIES ............................................................................................................. 8
3. PIN CONFIGURATION (Top View) ............................................................................................... 9
4. BLOCK DIAGRAM ........................................................................................................................ 11
5. PIN FUNCTION ............................................................................................................................... 12
5.1 Port Pins ................................................................................................................................................ 12
5.2 Pins Other Than Port Pins .................................................................................................................. 14
5.3 I/O Circuit Type of Respective Pins and Recommended Connections of Unused Pins ........... 16
6. CPU ARCHITECTURE ................................................................................................................... 20
6.1 Memory Space ...................................................................................................................................... 20
6.2 CPU Registers ...................................................................................................................................... 23
6.2.1 General-purpose registers .......................................................................................................... 23
6.2.2 Control registers .......................................................................................................................... 24
6.2.3 Special function registers (SFRs) ............................................................................................... 25
7. PERIPHERAL HARDWARE FUNCTIONS .................................................................................... 30
7.1 Ports ....................................................................................................................................................... 30
7.2 Clock Generator ................................................................................................................................... 31
7.3 Real-Time Output Port ......................................................................................................................... 33
7.4 Timer ...................................................................................................................................................... 34
7.5 A/D Converter ....................................................................................................................................... 37
7.6 D/A Converter ....................................................................................................................................... 38
7.7 Serial Interface ..................................................................................................................................... 39
7.7.1 Asynchronous serial interface/3-wire serial I/O (UART/IOE) ...................................................... 40
7.7.2 Clocked serial interface (CSI) ..................................................................................................... 42
7.8 Clock Output Function ........................................................................................................................ 43
7.9 Buzzer Output Function ...................................................................................................................... 44
7.10 Edge Detection Function .................................................................................................................... 44
7.11 Watch Timer .......................................................................................................................................... 44
7.12 Watchdog Timer ................................................................................................................................... 45
8. INTERRUPT FUNCTION ................................................................................................................ 46
8.1 Interrupt Sources ................................................................................................................................. 46
8.2 Vectored Interrupt ................................................................................................................................ 48
8.3 Context Switching ................................................................................................................................ 49
8.4 Macro Service ....................................................................................................................................... 49
8.5 Application Example of Macro Service ............................................................................................. 50
Data Sheet U12376EJ1V0DS00
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