UPD16682 Datasheet, PDF (34/56 Pages) NEC – 1/65 DUTY LCD CONTROLLER/DRIVER WITH ON-CHIP RAM

µ PD16682
12.18.2 Electronic volume register set command (second byte)
When six bits of data are set to the electronic volume register by this command, the LCD drive voltage VLC1 is set to
one of 64 possible voltage values.
Once this command has been input and the electronic volume register has been set, electronic volume mode is
canceled.
A0
E, /RD R,/W, /WR D7
D6
D5
D4
D3
D2
D1
D0
0
1
0
X
X
0
0
0
0
0
0
X
X
0
0
0
0
0
1
X
X
0
0
0
0
1
0
Remark X: Don’t Care
X
X
1
1
1
1
1
0
X
X
1
1
1
1
1
1
VLC1
Smaller value
↓
Larger value
Figure 12−3. Sequence of Electronic Volume Register Set Operations
Electronic volume mode set
Electronic volume register set
Cancel electronic volume mode
No
Changes completed?
Yes
12.19 Static Indicator (Two-Byte Command)
This command is used to control the indicator display for the static drive system. Only this command can control the
static indicator display, and it operates independently of other display control commands.
One of the electrodes for the static indicator’s LCD driver is connected to the FR pin and the other is connected to
the FRS pin. We recommend that these status indicator electrodes be implemented in a pattern that is separate from
the electrodes used for the dynamic drive. The LCD and the electrodes themselves may deteriorate if the patterns
are laid out too close to each other.
The static indicator ON command is a two-byte command that is used in a pair with the static indicator register set
command, so be sure to use both commands consecutively. (The static indicator OFF command is a one-byte
command.)
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Data Sheet S13368EJ3V0DS00