Datasheet-2

a-Si TFT LCD Single Chip Driver

132RGBx162 Resolution and 262K color

ILI9163C

Page 21 of 200

Version:0.09

6.2 Serial Interface

The Module uses a 3-wire 9-bit serial interface or 4-pins/8-bit bi-directional interface for communication between

the micro controller and the LCD driver chip. The 3-pins serial use: CSX (chip enable), SCL(serial clock) and

SDA(serial data input/output) and the 4-pins serial use: CSX(chip enable), D/CX(data/ command select),

SCL(serial clock), and SDA(serial data input/output).

Table 6.2.1 Serial Interface Type Selection

IM2

4WSPI

Interface Read back selection

0 0 3-Pins Serial Interface

Via the read instruction(8-bit, 24-bit and 32-bit read parameter)

0 1 4-Pins Serial Interface

Via the read instruction(8-bit, 24-bit and 32-bit read parameter)

6.2.1 Command Write

The write mode of the interface means the micro controller writes commands and data to the LCD driver. 3-pins

serial data packet contains a control bit D/CX and a transmission byte and in 4-pins serial case, data packet

contains just transmission byte and control bit D/CX is transferred by the D/CX pin. If D/CX is “low”, the

transmission byte is interpreted as a command byte. If D/CX is “high”, the transmission byte is stored in the

display data RAM (Memory write command), or command register as parameter.

Any instruction can be sent in any orders to the Driver. The MSB is transmitted first. The serial interface is

initialized when CSX is high status. In this state, SCL clock pulse or SDA data have no effect. A falling edge on

CSX enables the serial interface and indicated the start of data transmission.

Figure1: 3-pins Serial Data Stream Format

D/CX D7 D6 D0D1D2D3D5 D4

Transmission byte(TB) may be a command or a date

MSB

LSB

D/CX

Figure2: 4-pins Serial Data Stream Format

D7 D6 D0D1D2D3D5 D4

MSB

LSB

Transmission byte(TB) may be a command or a date

When CSX is “high”, SCL clock is ignored. At the falling edge of CSX, SCL can be high or low. SDA is sampled

at the rising edge of CSX. D/CX indicates, whether the byte is command code (D/CX=’0’) or parameter/RAM

data (D/CX=’1’). If CSX stays low after the last bit of command/data byte, the serial interface expects the D/CX

bit (3-pin serial interface) or D7(4-pins serial interface) of the next byte at the next rising edge of SCL.