ra8816 RAIO Technology Inc., ra8816 Datasheet - Page 26

• Manufacturer Part Number: ra8816
• Description: 144x65 Character/graphic Lcd Driver
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.6
RAiO TECHNOLOGY INC.
6-1-2 Serial Interface
The RA8816 aslo support three type serial interface. One is 3-Wires, one is IIC mode, and the
others are 4-Wires(A-Type, B-Type). This feature is control by the pin “P/ S ” and DB[7..6]. Refer to
Table 4-1. In serial mode the DB[7..6] are used as SMOD[1..0] to select the different serial mode.
Please also refer to Table 6-1. The Figure 6-3 to 6-5 are the interface diagram of MPU and RA8816
which in serial mode.
In the IIC mode, WR 、 RD and DB[5..2] are consist to the IICA[5..0] for the address selection of IIC
Bus device. The address setting is available only not conflict to other device.
In the 4-wire B-Type serial mode, the SCK signal has to add an external pull-hi rsistor as Figure 6-6.
SMOD
0 X
0 0
1 0
1 1
IIC(2-Wire). Use signals SCK, SDA and IICA[5..0]
3-Wires. Use signals SCK, SDA and CS .
4-Wires (A-Type). Use signals SCK, SDA, RS and CS .
4-Wires (B-Type). Use signals SCK, SDO, SDI and CS .
MPU
Figure 6-3：IIC interface Diagram
IO0
IO1
Table 6-1
VDD
Serial Interface Mode
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SMOD1(DB7)
SMOD0(DB6)
IICA5(WR)
IICA4(RD)
IICA3(DB5)
IICA2(DB4)
IICA1(DB3)
IICA0(DB2)
SCK(DB0)
SDA(DB1)
RA8816
144x65 Character/Graphic LCD Driver
P/S
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RA8816