Datasheet > RA8906

RA8906

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
瑞佑 - RAIO		微控制器
页数	文件大小	规格书
7页	114K
描述
8-Bit Micro-Controller

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数据手册

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RA8906 数据手册

RA8906

Version 2.1

8-Bit Micro-Controller

Block Diagram

80Byte

SRAM

8-Bit

e-MCU

e-RISC

64KByte

Flash ROM

CPU Core

Core

User

Registers

DACO1

DACO2

XCLKI

XCLKQ

RESET#

OSC.

DAC 1

DAC 2

Control

Logic

ISP/ISD

Time-Base

Timer x 3

MONITOR#

BREAK#

System

Interface

User I/O x 8

Watch-Dog

PT1_[7:0]

PT2_[7:0]

RS-232

Interface

System

Registers

RXD

TXD

Pin Description

Signal

RESET#

I/O

Description

External Hardware Reset, active low. This pin is used to reset the system.

BREAK#

User Program Break, active low. This signal is used to break the user’s

program from the ISD mode.

MONITOR#

Monitor Program Select, active low. This signal is used to select the system

boot from monitor program(ROM) or user program(Flash). This signal has to pull

low when user wants to download the data from PC or enter the ISP/ISD mode.

I/O

PT1_[7:0]

PT2_[7:0]

8-bit I/O of Port 1. These signals are used as general-purpose I/O port.

PT1_[7:0] provide 8mA driving current.

I/O

OUT

8-bit I/O of Port 2. These signals are used as general-purpose I/O port.

PT2_[7:2] provide 4mA driving current. PT2_[1:0] provide 16mA driving current.

DACO1

DACO2

DAC1/2 Current Output. In the DAC mode, this pin is the current output of

DAC1 and DAC2. In the PWM mode, this pin is the output of PWM.

RXD

Receive Data. This is the received data input of UART. Normally it’s connected

to the RS232’s TX of PC.

OUT

TXD

Transmit Data. This signal is the transmitted data output of UART. Normally it’s

connected to the RS232’s RX of PC.

XCLKI

Oscillator Input. This is the input signal of internal oscillator.

Oscillator Output. This is the output signal of internal oscillator.

OUT

XCLKQ

A[11:0]

Address Bus. These pins are used for external system ROM address. Normally,

users will not use these pins.

4/7

RAiO TECHNOLOGY INC.

www.raio.com.tw

1 2 345 6 7

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