RA8803 查看數據表（PDF） - RAIO

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RA8803

Two Layers Character/Graphic LCD Controller Specification

RAIO 

Version 2.1

RA8803/8822

Two Layers Character/Graphical LCD Controller

X’tal Input

XA

I

In internal clock mode, this pin connects to external X’tal(32768Hz).

In external clock mode, this is an input of external clock.

X’tal Output

XB

O

This pin connects to external X’tal(32768Hz).

4.4 Peripheral Interface

Pin Name

RST#

X1

X2

Y1

Y2

IOUT

KR[7..0]

KC[7.0]

CLK_OUT

SYS_NM

SYS_FQ

SYS_DW

I/O

Description

Reset Signal

I

This is a reset signal used to reset RA8803/8822. Active low.

Touch Panel Input

I

This is connecting to the left pin of 4-wire touch panel.

Touch Panel Input

I

This is connecting to the right pin of 4-wire touch panel.

Touch Panel Input

I

This is connecting to the top pin of 4-wire touch panel.

Touch Panel Input

I

This is connecting to the bottom pin of 4-wire touch panel.

DAC Current Output

O DAC current source output used to contrast voltage control. This pin is tri-

state when DAC disbale.

Key Pad Input

I

These pins are keypad inputs.

Key Pad Output

O

These pins are keypad outputs.

Clock Output

O

This is system clock output pin.

Test Pin

I

This is a test pin. Normally it has to connect high.

System Clock Select

This pin is used to select clock source.

Pull Low (0): X’tal/PLL Mode.

I

Pull High(1) : External Clock.

When SYS_FQ is Pull Low, then Internal oscillator and PLL are enable,

only one external 32Khz X’tal need.

When SYS_FQ is Pull High, then the system clock is from external pin

“XA”.

LCD Driver Data Bus Select

I

This pin is used to select data bus of LCD driver is 8-Bit or 4-Bit:

Pull Low(0) : 4-Bit

RAiO TECHNOLOGY INC.

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www.raio.com.tw

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