參數資料
型號: μPD789417
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數: 76/126頁
文件大?。?/td> 590K
代理商: ΜPD789417
76
μ
PD789415, 789416, 789417
5.10.3 LCD controller/driver control registers
The following three types of registers are used to control the LCD controller/driver.
LCD display mode register (LCDM)
LCD port selector (LPS)
LCD clock control register (LCDC)
(1) LCD display mode register (LCDM)
The LCDM specifies whether to enable display operation. It also specifies the operation mode, LCD drive
power supply, and display mode.
The LCDM is manipulated using a 1-bit or 8-bit memory manipulation instruction.
A RESET clears the LCDM to 00H.
Figure 5-37. LCD Display Mode Register Format
LCDON VAON
0
LIPS
0
LCDM2 LCDM1 LCDM0
LCDM
Symbol
Address
When reset
R/W
FFB0H
00H
R/W
7
6
5
4
3
2
1
0
LCD controller/driver display mode selection
LCDM2
0
0
0
0
1
4
3
2
3
Static
Not to be set
LCDM1
0
0
1
1
0
LCDM0
0
1
0
1
0
Control of LCD display
LCDON
0
1
Display OFF (All segment outputs are deselected.)
Display ON
LCD drive power supply selection
LIPS
0
1
LCD controller/driver operation mode
Note
VAON
0
1
Normal operation
Low-voltage operation
LCD drive power is not supplied.
LCD drive power is supplied to the BIAS pin.
Number of time slices
Bias mode
1/3
1/3
1/2
1/2
Other settings
Note
When the LCD display panel is not used, VAON and LIPS must be fixed to 0 to conserve power.
Caution
Before attempting to manipulate VAON, set LIPS and LCDON to 0 to turn off the LCD.
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