a-Si TFT LCD Single Chip Driver
240RGBx320 Resolution and 262K color
ILI9325
Set APE = “1” to start the generation of power supply according to the power supply startup sequence.
BT[3:0]: Sets the factor used in the step-up circuits.
Select the optimal step-up factor for the operating voltage. To reduce power consumption, set a smaller
factor.
BT[2:0]
3’h0
3’h1
3’h2
3’h3
3’h4
3’h5
3’h6
3’h7
DDVDH
VCL
VGH
VGL
Vci1 x 2
- Vci1
- Vci1 x 5
- Vci1 x 4
- Vci1 x 3
- Vci1 x 5
- Vci1 x 4
- Vci1 x 3
- Vci1 x 4
- Vci1 x 3
Vci1 x 6
Vci1 x 2
Vci1 x 2
Vci1 x 2
- Vci1
- Vci1
- Vci1
Vci1 x 5
Vci1 x 4
Notes: 1. Connect capacitors to the capacitor connection pins when generating DDVDH, VGH, VGL and VCL levels.
2. Make sure DDVDH = 6.0V (max.), VGH = 15.0V (max.), VGL = – 12.5V (max) and VCL= -3.0V (max.)
8.2.15. Power Control 2 (R11h)
R/W RS
D15 D14 D13 D12 D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
W
1
0
0
0
0
0
DC12 DC11 DC10
0
DC02 DC01 DC00
0
VC2 VC1 VC0
VC[2:0] Sets the ratio factor of Vci to generate the reference voltages Vci1.
VC2
VC1
VC0
Vci1 voltage
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0.95 x Vci
0.90 x Vci
0.85 x Vci
0.80 x Vci
0.75 x Vci
0.70 x Vci
Disabled
1.0 x Vci
DC0[2:0]: Selects the operating frequency of the step-up circuit 1. The higher step-up operating frequency
enhances the drivability of the step-up circuit and the quality of display but increases the current
consumption. Adjust the frequency taking the trade-off between the display quality and the current
consumption into account.
DC1[2:0]: Selects the operating frequency of the step-up circuit 2. The higher step-up operating frequency
enhances the drivability of the step-up circuit and the quality of display but increases the current
consumption. Adjust the frequency taking the trade-off between the display quality and the current
consumption into account.
DC02 DC01 DC00 Step-up circuit1
step-up frequency (fDCDC1
Fosc
DC12 DC11 DC10 Step-up circuit2
step-up frequency (fDCDC2
Fosc / 4
)
)
0
0
0
0
0
0
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