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UPD784225GC: 产品描述16/8-BIT SINGLE-CHIP MICROCONTROLLERS; 文件大小384KB，共92页; 制造商NEC ( Renesas ); 官网地址https://www2.renesas.cn/zh-cn/

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UPD784225GC概述

16/8-BIT SINGLE-CHIP MICROCONTROLLERS

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DATA SHEET

MOS INTEGRATED CIRCUIT

PD784224, 784225, 784224Y, 784225Y

16/8-BIT SINGLE-CHIP MICROCONTROLLERS

The

PD784224 and 784225 are products of the

PD784225 Subseries in the 78K/IV Series. Besides a high-

speed and high performance CPU, these controllers have ROM, RAM, I/O ports, 8-bit resolution A/D and D/A

converters, timers, serial interfaces, a real-time output port, interrupt functions, and various other peripheral

hardware.

The

PD784224Y and 784225Y are based on the

PD784225 Subseries with the addition of a multimaster-

supporting I

C bus interface.

Flash memory versions, the

PD78F4225 and 78F4225Y, which replace the internal ROM of the mask ROM

version with flash memory, and various development tools are also available.

The functions are explained in detail in the following user’s manuals. Be sure to read this manual when

designing your system.

PD784225, 784225Y Subseries User’s Manual - Hardware : U12697E

78K/IV Series User’s Manual - Instruction

: U10905E

FEATURES

• I

C bus

• ROM correction

• Inherits peripheral functions of

PD780058Y

Subseries

• Minimum instruction execution time

160 ns (main system clock f

= 12.5 MHz)

s (subsystem clock f

= 32.768 kHz)

• I/O port: 67 pins

• Timer/counter: 16-bit timer/counter

1 unit

8-bit timer/counter

4 units

• Serial interface: 3 channels

UART/IOE (3-wire serial I/O): 2 channels

CSI (3-wire serial I/O, multi-master supporting I

bus

Note

): 1 channel

Note

PD784225Y Subseries only

• Standby function

HALT/STOP/IDLE mode

In power-saving mode: HALT/IDLE mode (with

subsystem clock)

• Clock division function

• Watch timer: 1 channel

• Watchdog timer: 1 channel

• Clock output function

, f

/2, f

, f

selectable

• Buzzer output function

, f

selectable

• A/D converter: 8-bit resolution

8 channels

• D/A converter: 8-bit resolution

2 channels

• Supply voltage: V

= 1.8 to 5.5 V

APPLICATION FIELD

Car audio, portable audio, telephones, etc.

Unless contextually excluded, references in this document to

PD784225 mean

PD784224, 784225, 784224Y,

and 784225Y.

The information in this document is subject to change without notice. Before using this document, please

confirm that this is the latest version.

Document No. U12376EJ1V0DS00 (1st edition)

Date Published May 2000 J CP(K)

Printed in Japan

The mark

shows major revised points.

1997, 2000

PD784224, 784225, 784224Y, 784225Y

CONTENTS

DIFFERENCES AMONG MODELS IN

PD784225, 784225Y SUBSERIES .............................. 7

MAJOR DIFFERENCES BETWEEN

PD784216Y SUBSERIES AND

PD780058Y SUBSERIES ............................................................................................................. 8

PIN CONFIGURATION (Top View) ............................................................................................... 9

BLOCK DIAGRAM ........................................................................................................................ 11

PIN FUNCTION ............................................................................................................................... 12

5.1

5.2

5.3

Port Pins ................................................................................................................................................ 12

Pins Other Than Port Pins .................................................................................................................. 14

I/O Circuit Type of Respective Pins and Recommended Connections of Unused Pins ........... 16

CPU ARCHITECTURE ................................................................................................................... 20

6.1

6.2

Memory Space ...................................................................................................................................... 20

CPU Registers ...................................................................................................................................... 23

6.2.1

6.2.2

6.2.3

General-purpose registers .......................................................................................................... 23

Control registers .......................................................................................................................... 24

Special function registers (SFRs) ............................................................................................... 25

PERIPHERAL HARDWARE FUNCTIONS .................................................................................... 30

7.1

7.2

7.3

7.4

7.5

7.6

7.7

Ports ....................................................................................................................................................... 30

Clock Generator ................................................................................................................................... 31

Real-Time Output Port ......................................................................................................................... 33

Timer ...................................................................................................................................................... 34

A/D Converter ....................................................................................................................................... 37

D/A Converter ....................................................................................................................................... 38

Serial Interface ..................................................................................................................................... 39

7.7.1

7.7.2

7.8

7.9

Asynchronous serial interface/3-wire serial I/O (UART/IOE) ...................................................... 40

Clocked serial interface (CSI) ..................................................................................................... 42

Clock Output Function ........................................................................................................................ 43

Buzzer Output Function ...................................................................................................................... 44

7.10 Edge Detection Function .................................................................................................................... 44

7.11 Watch Timer .......................................................................................................................................... 44

7.12 Watchdog Timer ................................................................................................................................... 45

INTERRUPT FUNCTION ................................................................................................................ 46

8.1

8.2

8.3

8.4

8.5

Interrupt Sources ................................................................................................................................. 46

Vectored Interrupt ................................................................................................................................ 48

Context Switching ................................................................................................................................ 49

Macro Service ....................................................................................................................................... 49

Application Example of Macro Service ............................................................................................. 50

Data Sheet U12376EJ1V0DS00

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