Lcd Drive Voltage Selection - Panasonic MN101L Series User Manual

17.3.4

LCD Drive Voltage Selection

LCD drive voltage can be generated with one of the three method described in Table:17.3.1.
Method of generating LCD drive voltage
Generate the drive voltage
1
outside the LSI
Generate the drive voltage
with BSTVOL
(The reference voltage is supplied
from outside of the LSI.)
2
Generate the drive voltage
with BSTVOL
3
(The reference voltage is generated
with REFVOL.)
The supply voltage to VLC1 (V
≤ V
(V
DD30 LC1
..
..
Table:17.3.1
LCD Drive Voltage Supply Method
Supply the voltage generated outside of the LSI to VLC1, VLC2
and VLC3.
<2 or 3 times boosting>
Supply the reference voltage (V
2 times higher voltage of V
3 times higher voltage of V
<1/2 or 3/2 times boosting (1/3 bias)>
Supply the reference voltage (V
1/2 times lower voltage of V
3/2 times higher voltage of V
<2 times boosting (1/2 bias)>
Supply the reference voltage (V
2 times higher voltage of V
No need to supply voltage from outside of the LSI.
) must be kept between V
LC1
≤ 3.6 V).
Description
) to VLC3.
LC3
is output from VLC2.
LC3
is output from VLC1.
LC3
) to VLC2.
LC2
is output from VLC3.
LC2
is output from VLC1.
LC2
) to VLC2 and VLC3.
LC2
is output from VLC1.
LC2
and 3.6 V.
DD30
Chapter 17
LCD
Operation XVII - 19