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參數(shù)資料
| 型號： | S1C621C0D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 1.3 MHz, MICROCONTROLLER, UUC74 |
| 封裝： | DIE-74 |
| 文件頁數(shù)： | 47/108頁 |
| 文件大小： | 992K |
| 代理商： | S1C621C0D |
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S1C621C0 TECHNICAL MANUAL
EPSON
35
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (LCD Driver)
4.7.7 Control of LCD driver
Table 4.7.7.1 shows the LCD driver's control bits and their addresses. Figure 4.7.7.1 shows the display
memory map.
Table 4.7.7.1 LCD driver control bits
Address
Comment
Register
D3
D2
D1
D0
Name
Init
1
0
*1
LDTY0
LPWR
R
LDMS
STCD
LDTY1
LDTY0
0
LOFF
LPWR
0
–
0
0p(R/W)
Static
All off
On
4p(W)
Dynamic
Normal
Off
LDTY1
LOFF
STCD
0
LDMS
0
C0H
C1H
*2
*5
*7
LCD display memory area selection
LCD drive switch
LCD drive duty selection
0: 1/2, 1: 1/3, 2&3: 1/4
Unused
LCD display control
LCD power supply On/Off
R/W
*1 Initial value at the time of initial reset
*5 Constantly "0" when being read
*2 Not set in the circuit
*6 Refer to main manual
*3 Undefined
*7 Page switching in I/O memory is not necessary
*4 Reset (0) immediately after being read
Address
Page
High
Low
01
234
567
89
A
B
C
D
E
F
5
6
7
0
or
4
Display memory (48 words x 4 bits)
Page 0: R/W
Page 4: W
Fig. 4.7.7.1 Display memory map
LPWR: LCD power supply ON/OFF (C1HD0)
Controls the LCD power ON and OFF
When "1" is written:
Power ON
When "0" is written:
Power OFF
Reading:
Valid
By writing "1" to LPWR, the LCD power goes ON.
When "0" is written, the LCD power goes OFF and all terminals of the COM output and SEG output
become VSS level.
This control does not affect to SEG terminals that have been set for DC output.
At initial reset, this register is set to "0".
LOFF: LCD display control (C1HD1)
Controls the LCD display
When "1" is written:
Display all OFF
When "0" is written:
Display ON
Reading:
Valid
When "1" is written to LOFF, all LCD dots will fade out; writing "0" will set it back to normal.
All fading out of LCD at LOFF = "1" is due to light out signals and does not affect the content of the
segment data memory.
Flashing on the entire LCD panel is performed by this function.
At initial reset, this register is set to "0".
STCD: LCD drive switch (C0HD2)
Switches the LCD driving method.
When "1" is written:
Static drive
When "0" is written:
Dynamic drive
Reading:
Valid
By writing "1" to STCD, static drive is selected, and dynamic drive is selected when "0" is written.
At initial reset, this register is set to "0".
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