SSD1298 Crystalfontz America, Inc.,, SSD1298 Datasheet - Page 42

• Manufacturer Part Number: SSD1298
• Description: 240 Rgb X 320 Tft Lcd Controller Driver Integrated Power Circuit, Gate And Source Driver With Built-in Ram
• Manufacturer: Crystalfontz America, Inc.,

Power Control 3 (R0Dh) (POR = 0009h)
VRH[3:0]: Set amplitude magnification of V
voltage set by VRH[3:0].
Power Control 4 (R0Eh) (POR = 3200h)
VcomG: When VcomG = “1”, it is possible to set output voltage of VcomL to any level, and the instruction (VDV4-0)
becomes available. When VcomG = “0”, VcomL output is fixed to Hi-z level, VCIM output for VcomL power supply
stops, and the instruction (VDV4-0) becomes unavailable. Set VcomG according to the sequence of power supply setting
flow as it relates with power supply operating sequence.
VDV[4:0]: Set the alternating amplitudes of Vcom at the Vcom alternating drive. These bits amplify 0.6 to 1.23 times
the VLCD63 voltage. When VcomG = “0”, the settings become invalid. External voltage at VcomR is referenced when
VDV = “01111”.
R/W
R/W
W
W
Solomon Systech
POR*
POR*
DC
DC
1
1
IB15 IB14
IB15 IB14
0
0
0
0
0
0
0
0
VCOMG VDV4 VDV3 VDV2 VDV1 VDV0
IB13
IB13
VDV4
*Vref is the internal reference voltage equals to 2.0V.
Note: Vcom amplitude < 6V
0
0
1
0
0
0
0
0
0
1
1
1
1
1
1
VRH3
IB12 IB11
IB12 IB11
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
1
VDV3
0
0
0
1
1
1
0
0
0
0
0
1
VRH2
0
0
0
VCOML = 0.9475*VCOMH - VCOMA
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
VDV2
IB10
IB10
0
0
0
1
1
1
0
0
1
1
1
∗
LCD63
:
:
:
:
:
:
0
0
0
VRH1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
. These bits amplify the V
IB9
IB9
VDV1
0
0
1
0
0
1
0
1
1
0
0
0
1
1
∗
VRH0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
IB8
IB8
0
0
0
VDV0
0
1
0
1
0
0
1
1
0
1
1
∗
IB7
IB7
0
0
0
0
V
Vref x 2.810
Vref x 2.900
Vref x 3.000
Vref x 1.780
Vref x 1.850
Vref x 1.930
Vref x 2.020
Vref x 2.090
Vref x 2.165
Vref x 2.245
Vref x 2.335
Vref x 2.400
Vref x 2.500
Vref x 2.570
Vref x 2.645
Vref x 2.725
LCD63
IB6
IB6
Vcom Amplitude
0
0
0
0
external variable
Voltage
Reference from
VLCD63 x 0.60
VLCD63 x 0.63
VLCD63 x 0.66
VLCD63 x 0.99
VLCD63 x 1.02
VLCD63 x 1.05
VLCD63 x 1.08
VLCD63 x 1.20
VLCD63 x 1.23
Step = 0.03
Step = 0.03
Mar 2008 P 42/82
Reserved
Reserved
resistor
IB5
IB5
LCD63
0
0
0
0
:
:
:
:
voltage 1.78 to 3.00. times the Vref
IB4
IB4
0
0
0
0
VRH3 VRH2 VRH1 VRH0
IB3
IB3
1
0
0
Rev 1.1
IB2
IB2
0
0
0
IB1
IB1
0
0
0
IB0
IB0
1
0
0
SSD1298