a-Si TFT LCD Single Chip Driver
240RGBx320 Resolution and 262K color
ILI9325
Pin Name
I/O
Type
Descriptions
capacitor
Stabilizing
capacitor
Stabilizing
capacitor
VGH
I
I
Power supply for the gate driver.
VGL
VCL
Power supply for the gate driver.
VcomL driver power supply.
Stabilizing
capacitor
O
VCL = 0.5 ~ –VCI . Place a stabilizing capacitor between GND
Capacitor connection pins for the step-up circuit 1.
C11+, C11-
C12+, C12-
C13+, C13-
C21+, C21-
C22+, C22-
Step-up
capacitor
I/O
I/O
Step-up
capacitor
Capacitor connection pins for the step-up circuit 2.
Output voltage generated from the reference voltage.
The voltage level is set with the VRH bits.
Stabilizing
capacitor
VREG1OUT
I/O
VREG1OUT is (1) a source driver grayscale reference voltage, (2)
VcomH level reference voltage, and (3) Vcom amplitude reference
voltage. Connect to a stabilizing capacitor. VREG1OUT = 3.0 ~
(DDVDH – 0.5)V.
Power Pads
A supply voltage to the interface pins:
IM[3:0], nRESET, nCS, nWR, nRD, RS, DB[17:0], VSYNC, HSYNC,
DOTCLK, ENABLE, SCL, SDI, SDO.
IOVcc = 1.65 ~ 3.3V and Vcc ≧IOVcc. In case of COG, connect to
Power
supply
IOVcc
I
Vcc on the FPC if IOVcc=Vcc, to prevent noise.
Digital circuit power pad.
Connect these pins with the 1uF capacitor.
VDDD
GND
O
I
Power
Power
supply
GND = 0V.
Test Pads
Dummy pad.
Leave these pins as open.
DUMMY1~ 15
DUMMY20 ~ 27
-
-
IOGNDDUM
TESTO1~16
O
O
GND
GND pin.
Open
Test pins. Leave them open.
Test pins (internal pull low).
Connect to GND or leave these pins as open.
Test pins (internal pull low). Leave them open.
TEST1, 2, 3
TS0~8
I
I
IOGND
OPEN
Liquid crystal power supply specifications Table 1
No.
1
2
Item
Description
720 pins (240 x RGB)
320 pins
TFT Source Driver
TFT Gate Driver
3
TFT Display’s Capacitor Structure
Cst structure only (Common VCOM)
V0 ~ V63 grayscales
VGH - VGL
VCOMH - VCOML: Amplitude = electronic volumes
1.65 ~ 3.30V
2.50 ~ 3.30V
S1 ~ S720
G1 ~ G320
VCOM
Liquid
Output
Crystal
Drive
4
5
IOVcc
Vci
Input Voltage
The information contained herein is the exclusive property of ILI Technology Corp. and shall not be distributed,
reproduced, or disclosed in whole or in part without prior written permission of ILI Technology Corp.
Page 12 of 111
Version: 0.35
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