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參數(shù)資料
| 型號(hào)： | UPD161401W |
| 廠商： | NEC Corp. |
| 英文描述： | 256-COLOR, 1/80-DUTY LCD CONTROLLER/DRIVER WITH ON-CHIP RAM |
| 中文描述： | 256色，1/80-DUTY LCD控制器/驅(qū)動(dòng)器，片內(nèi)RAM |
| 文件頁(yè)數(shù)： | 55/124頁(yè) |
| 文件大?。?/td> | 647K |
| 代理商： | UPD161401W |
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Data Sheet S15726EJ2V0DS
55
μ
PD161401
5.8 Display Mode
5.8.1
Selecting display mode
The
μ
PD161401 has two display modes: main duty display and sub-duty display. In each of these modes, any duty
ratio can be selected and parts other than the display area can be scanned with a non-selected waveform.
The display mode can be selected by using the DTY flag of control register 2 (R1), and parameters such as the duty
ratio, bias value, and number of boosting steps are automatically selected as shown in the table below.
Display Setting
Main Duty Display (DTY = 0)
Sub-duty Display (DTY = 1)
Duty ratio
Main duty setting register (R14)
Sub-duty setting register (R17)
N-line inversion
Main duty N-line inversion register (R15)
Sub-duty N-line inversion register (R18)
M-line shift
Main duty M-line shift register (R16)
Sub-duty M-line shift register (R19)
V
LCD
adjustment
Power system control register 2 (R53)
VRR3 to VRR0
Power system control register 2 (R53)
SVR3 to SVR0
Bias value
Power system control register 3 (R54)
BIS2 to BIS0
Power system control register 3 (R54)
SBIS2 to SBIS0
Number of boosting steps
Power system control register 4 (R55)
MBT2 to MBT0
Power system control register 4 (R55)
SBT2 to SBT0
Electronic volume
Main electronic volume register (R57)
Sub-electronic volume register (R58)
Grayscale data setting
Main R grayscale data registers (R65 to R72)
Main G grayscale data registers (R73 to R80)
Main B grayscale data registers (R81 to R84)
Sub R grayscale data registers (R85 to R92)
Sub G grayscale data registers (R93 to R100)
Sub B grayscale data registers (R101 to R104)
When the mode is changed from the main duty display mode to the sub-duty display mode or vice versa, the display
screen may be temporarily disturbed, depending on the setting of each duty mode, if electric charge remains in the
smoothing capacitor connected between the LCD drive voltage pins (V
LCD
, V
LC1
to V
LC4
) and V
SS
. It is recommended
that the following power sequence be observed to avoid any trouble that may occur when the display mode is changed.
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