ST7628
9.1.49 VopOfsetDec: Vop Decrease 1 (C2H)
Command
A0
/RD /WR
D7
D6
D5
D4
D3
D2
D1
D0
Hex
(C2h)
0
1
0
1
1
0
0
0
0
1
0
VopOfsetDec
NOTE: “-“ Don’t care
Description
With the VopOfsetInc and VopOfsetDec command the V0 voltage and therewith the contrast of
the LCD can be adjusted. This command decreases the value of Vop offset register by 1.
If you set the electronic control value to 0000000, the control value is set to 1111111 after this
command has been executed.
Electronic Control Value
0111111
0111110
0111101
…
Decimal Equivalent
V0 Offset
+2520 mV
+2480 mV
+2440 mV
…
63
62
61
…
2
0000010
0000001
0000000
1111111
1111110
…
+80 mV
+40 mV
0 mV
1
0
-1
-40 mV
-80 mV
…
-2
…
-62
-63
-64
1000010
1000001
1000000
-2480 mV
-2520 mV
-2560mV
Table 9.1.1 Possible Vop[6:0] values
Restriction
Register
Status
Availability
Availability
Normal Mode On, Idle Mode Off, Sleep Out
Normal Mode On, Idle Mode On, Sleep Out
Partial Mode On, Idle Mode Off, Sleep Out
Partial Mode On, Idle Mode On, Sleep Out
Sleep In
Yes
Yes
Yes
Yes
Yes
Default
Status
Default Value
Power On Sequence
--
--
--
S/W Reset
H/W Reset
Ver 1.4
152/213
2008/08
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
