UPD16488AP NEC [NEC], UPD16488AP Datasheet - Page 68

• Manufacturer Part Number: UPD16488AP
• Description: 1/92 DUTY LCD CONTROLLER/DRIVER WITH FOUR-LEVEL GRAY SCALE, ON-CHIP RAM
• Manufacturer: NEC [NEC]

6.27 Power System Control Register 3 (R34)
number of boost levels for partial display mode.
Note
Default settings (initial values set by reset command)
FBS2 to FBS0
This command sets the power system mode, including the bias setting for the µ PD16488A's normal display mode and the
BIS2 to BIS0
BST1, BST0
RS
D
68
1
0
7
Be sure to execute the HALT command before changing these flag settings.
Flag
BIS2
D
D
Note
0
Note
7
6
These three flags select the bias ratio as shown below.
When partial display mode is set, the bias ratio set by the partial mode setting register (R10) is automatically
selected.
The number of boost levels in booster for normal display mode is selected as shown below.
The number of boost levels in the booster for partial display mode is selected as shown below.
FBS2
BST1
BIS1
BIS2
D
D
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
6
5
FBS1
BST0
BIS0
BIS1
D
D
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
5
4
Boost level
x2
x3
x4
Prohibited
FBS2
FBS0
BIS0
D
D
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
4
3
Bias ratio
1/12 bias
1/11 bias
1/10 bias
1/9 bias
1/8 bias
1/7 bias
Prohibited
Prohibited
Boost level
x4
x5
x6
x7
x8
x9
Prohibited
Prohibited
FBS1
D
D
Data Sheet S15745EJ2V0DS
0
3
2
FBS0
D
D
0
2
1
BST1
Function
D
D
0
1
0
BST0
D
0
Setting
−
µ µ µ µ PD16488A