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參數(shù)資料
| 型號： | S1C6S460D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 2 MHz, MICROCONTROLLER, UUC124 |
| 封裝： | 4.69 X 4.68 MM, DIE-124 |
| 文件頁數(shù)： | 58/107頁 |
| 文件大?。?/td> | 788K |
| 代理商： | S1C6S460D |
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46
EPSON
S1C6S460 TECHNICAL MANUAL
CHAPTER 7: LCD DRIVER
7.2 Mask Option
Disconnecting the internal power for LCD driving will enable electric potentials to be supplied externally.
In such case, the 5 electric potentials are entered in VL1, VL2, VL3, VL4 and VL5 terminals and 1/5 bias
driving may then be set. Since 1/5 bias driving provides better display quality, when low power current
consumption is not required (i.e., when power is supplied from AC outlet), select external power mode.
However, note that in order to maintain a stable display, power source must be one which will remain
stable even when heavy load such as buzzer, etc. is driven.
Moreover, in the external power mode, the contrast adjustment function cannot be used. Accommodate
this limitation by utilizing the external circuit as necessary.
A sample circuit of external power for LCD driving when power is supplied externally is shown in Figure
7.2.1.
VDD
VL1
VL2
VL3
VL4
VSS
Rxx
S1C6S460
VDD
VSS
VL5
Power save circuit
Fig. 7.2.1 Sample circuit of external power for LCD driving when power is supplied externally
7.3 Display Data Memory
The display data memory of the S1C6S460 is allocated to the built-in RAM addresses E00H–E4FH and
E80H–ECFH.
Figure 7.3.1 shows the correspondence between the display data memory and the LCD dot matrix.
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
COM9
COM10
COM11
COM12
COM13
COM14
COM15
D0
D1
D2
D3
D0
D1
D2
D3
D0
D1
D2
D3
D0
D1
D2
D3
SEG0
E00H
s
E01H
E80H
E81H
D0
D1
D2
D3
D0
D1
D2
D3
D0
D1
D2
D3
D0
D1
D2
D3
SEG1
E02H
s
E03H
E82H
E83H
D0
D1
D2
D3
D0
D1
D2
D3
D0
D1
D2
D3
D0
D1
D2
D3
SEG2
E04H
s
E05H
E84H
E85H
D0
D1
D2
D3
D0
D1
D2
D3
D0
D1
D2
D3
D0
D1
D2
D3
SEG3
E06H
s
E07H
E86H
E87H
D0
D1
D2
D3
D0
D1
D2
D3
D0
D1
D2
D3
D0
D1
D2
D3
SEG39
E4EH
s
E4FH
ECEH
ECFH
Memory address
Data bit
Fig. 7.3.1 LCD dot matrix and segment memory correspondence
When the segment memory bit is assigned as "1", the corresponding LCD dot lights up, and when
assigned as "0", the dot dies out. At 1/16 duty drive and 1/8 duty drive, COM0 to COM15 lines and
COM0 to COM7 lines light up, respectively.
At initial reset, the display data memory content becomes undefined and hence, there is need to initialize
by software.
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