UPD16488AP NEC [NEC], UPD16488AP Datasheet - Page 56

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

6.2 Control Register 2 (R1)
Note The HALT command must be executed before changing this flag's setting.
Default settings (initial values set by reset command)
This command specifies the µ PD16488A's general operation modes.
FDM
DSEL
BWW
GRAY
DTY
INC
RS
Duty
Booster
Bias level
Gray scale data
(1+Rb/Ra)
V
factor
Electronic volume
D
56
1
0
LCD
7
Note
Flag
Note
regulator resistance
/RD
D
E
1
0
Item
6
Settings for full screen display mode
0: Normal operation
1: Full screen display (set entire screen to ON) (When using four-level gray scale, gray-scale level 32 is output
Selects display screen during monochrome display mode.
0: Screen 1
1: Screen 2
Selects data write screen during monochrome display mode.
0: Screen 1
1: Screen 2
0: 4-level gray scale display mode
1: Monochrome display mode
0: Normal display mode (1/1 to 1/128 duty)
1: Partial display mode (1/12, 1/25, or 1/38 duty, 1/5 or 1/6 bias)
0: Increments X address at each access
1: Increments Y address at each access
R,/W
/WR
D
for full screen display).
0
0
5
Table 6-3. Relationship between IC's Functions and Display Modes
FDM
1/1 to 1/92 duty
×4, ×5, ×6, ×7, ×8, ×9
1/11, 1/12, 1/10, 1/9, 1/8, 1/7
Uses levels set to the gray scale data
registers (R23 to R26)
Uses values of VRR2 to VRR0 in the power
system control register 2 (R33)
Uses value from the electronic volume
register (R35)
D
D
0
7
4
Normal Display Mode (DTY = 0)
D
D
−
0
6
3
D
D
Data Sheet S15745EJ2V0DS
−
0
5
2
DSEL
D
D
0
4
1
BWW
Function
D
D
0
3
0
↔
↔
↔
↔
↔
↔
GRAY
D
2
1/12, 1/25, or 1/38 duty
×2, ×3, ×4
1/5, 1/6
Uses levels set to the partial gray scale
data registers (R27 to R30)
Uses values of PVR2 to PVR0 in the power
system control register 2 (R33)
Uses value from the partial electronic
volume register (R36)
Partial Display Mode (DTY = 1)
DTY
D
1
INC
D
0
µ µ µ µ PD16488A