RA8816 查看數據表（PDF） - RAIO

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RA8816

144x65 Character/Graphic LCD Driver

RAIO 

Preliminary Version 1.6

RA8816

144x65 Character/Graphic LCD Driver

4. Pin Definition

4-1 MPU Interface

Pin Name

Table 4-1

I/O

Description

Data Bus

When the MPU use parallel mode and 8-bit then all of the DB[7..0] are

valid. When use 4-bit then only DB[3..0] are valid, and DB[7..4] have to

keep floating.

DB[7..0]

DB0: SCK

DB1: SDA/SDO I/O

DB2: RS/SDI

DB3: CS

DB[7..6]: SMOD

RD

I

EN

WR

I

R/ W

D/ C

I

RS

When P/ S is “0”, then the interface between MPU and RA8816 is Serial

Mode. The pins DB[7..6](SMOD[1..0]) are used to select which serial

mode:

SMOD :

Serial Mode

-----------------------------------------------------------------

0 0 : IIC interface, SCK, SDA are used

0 1 : 3-Wire, SCK, SDA, CS are used.

1 0 : 4-Wire, SCK, SDA, RS, CS are used.

1 1 : 4-Wire, SCK, SDO, SDI, CS are used.

In serial mode, all of the related signals are defined by DB[3..0]:

SCK(DB0) : Serial Clock.

SDA(DB1) : Bi-direction Mode Serial Data.

SDO(DB1) : Data Out.

RS(DB2) : Memory/Register Cycle Select.

SDI(DB2) : Serial Data In.

CS (DB3) : Chip Select, active low.

In the IIC mode, WR , RD and DB[5..2] are used as the IIC device

address - IICA[5..0] to avoid conflict with other IIC devices.

The unused pin must keep NC for serial mode.

Read Control or Enable

When use 8080 series interface, RD is the read signal and active low.

When use 6800 series interface, EN is the Enable signal and active high.

In the IIC mode, RD is used as IIC device address - IICA[4].

This pin must keep NC for 3 or 4-wires serial mode.

Write Control or Read-Write Control

When use 8080 series interface, WR is the write signal and active low.

When use 6800 series interface, this pin is R/ W , active high for read

cycle and active low for write cycle.

In the IIC mode, WR is used as IIC device address - IICA[5].

This pin must keep NC for 3 or 4-wires serial mode.

Data/Command Select or Register Select)

When use 8080 series interface, this is Data or Command signal. When

D/ C is “0”, means Register Cycle(or Command Cycle). When D/ C is

“1”, means Data Access Cycle(Data Cycle).

When use 6800 series interface, this is the RS signal. When RS is “0”,

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