参数资料
型号: M34551E8FP
元件分类: 微控制器/微处理器
英文描述: 4-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP48
封装: 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件页数: 16/155页
文件大小: 1329K
代理商: M34551E8FP
APPLICATION
2.5 LCD function
2-34
4551 Group User’s Manual
(3)
LCD display method
The 4551 Group has the LCD RAM area for the LCD display.
When “1” is written to a bit in the LCD RAM data, the display pixel which correspond to the bit
automatically turns on.
Figure 2.5.2 shows the LCD RAM map.
Fig. 2.5.2 LCD RAM map
2.5.2 Related registers
(1)
LCD control register L1
The LCD duty and bias selection bits are assigned to bits 0 and 1. The LCD on/off bit is assigned
to the bit 2.
Set the contents of this register through register A with the TL1A instruction. The TAL1 instruction
can be used to transfer the contents of register L1 to register A.
Table 2.5.2 shows the LCD control register L1.
Table 2.5.2 LCD control register L1
LCD control register L1
at reset : 00002
at power down : state retained
R/W
Not used
LCD on/off bit
LCD duty and bias selection bits
L13
L12
L11
L10
0
1
0
1
Note: “R” represents read enabled, and “W” represents write enabled.
Duty
1/2
1/3
1/4
Bias
1/2
1/3
L11
0
1
L10
0
1
0
1
This bit has no function, but read/write is enabled.
Off
On
Not available
Z
X
Y
8
9
10
11
12
13
14
15
COM
1
01
2
3
21
0
3
21
0
3
21
0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
COM3
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
COM2
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
COM1
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
COM0
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
COM3 COM2 COM1 COM0 COM3 COM2 COM1 COM0
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG0
SEG0 SEG0 SEG0
SEG8
SEG17
SEG18
SEG19
SEG16
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG17
SEG18
SEG19
SEG16
SEG17
SEG18
SEG19
SEG16
SEG17
SEG18
SEG19
SEG16
Bit
Note:
LCD display RAM is not assigned.
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