upd161608 Renesas Electronics Corporation., upd161608 Datasheet - Page 42

• Manufacturer Part Number: upd161608
• Description: 176-rgb X 220-dot 1-chip Driver Ic For 262,144-color Tft-lcd Display
• Manufacturer: Renesas Electronics Corporation.

13.8 Power Supply Control 4 (R0EH)
NOTP2: NOTP2 becomes “0” after power on reset and VCOM amplitude voltage becomes programmed EEPROM value.
VCOMG: When VCOMG = “1”, it is possible to set output voltage of VCOML to any level, and the instruction (VDV4-
VDV4-VDV0: Set the alternating amplitudes of VCOM at the VCOM alternating drive. These bits amplify VCOM amplitude
42
R/W
W
When NOTP1 set to “1”, setting of VDV4-VDV0 becomes valid and voltage of VCOM amplitude voltage can be
adjusted.
VDV0) becomes available. When VCOMG = “0”, VCOML output is fixed to Hi-Z level, VCI2 output for VCOML
power supply stops, and the instruction (VDV4-VDV0) becomes unavailable. Set VCOMG according to the
sequence of power supply setting flow as it relates with power supply operating sequence.
RS
1
0.6 to 1.23 times the VLCD63 voltage. When VCOMG = “0”, the settings become invalid. External voltage at
VCOMR is referenced when VDV4-VDV0 = “01111”.
Remark *: Don’t care
Caution When set to 8-color mode (CM = H), VCOML output voltage is fixed to 0 V and above-
VDV4
0
0
0
0
0
0
1
1
1
1
1
1
:
:
NOTP2
IB15 IB14 IB13 IB12 IB11 IB10
mentioned setting is ignored.
Dummy2
VDV3
0
0
0
1
1
1
0
0
0
0
0
1
:
:
VCOMG
VDV4
VDV2
0
0
0
1
1
1
0
0
1
1
1
*
:
:
VDV3 VDV2 VDV1 VDV0
Data Sheet S17594EJ2V0DS
VDV1
0
0
1
0
1
1
0
0
0
1
1
*
:
:
IB9
VDV0
IB8
0
1
0
1
0
1
0
1
1
0
1
*
:
:
IB7
0
Reference from external variable
IB6
0
VCOM amplitude
IB5
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
Setting disable
Setting disable
0
Step = 0.03
Step = 0.03
resister
IB4
:
:
:
:
0
IB3
0
IB2
0
μ
PD161608
IB1
0
IB0
0