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): 55/107頁
文件大?。?/td> 788K
代理商: S1C6S460D
S1C6S460 TECHNICAL MANUAL
EPSON
43
CHAPTER 7: LCD DRIVER
CHAPTER
7 LCD DRIVER
The S1C6S460 has 16 common terminals and 40 segment terminals and can drive a maximum of 640 (40
×
16) dots (8 characters
× 2 lines) LCD.
This LCD driver performs the following control through the software.
Drive duty can be set to 1/16 or 1/8 duty.
LCD contrast can be adjusted through a 16 steps range.
All dots of the LCD panel can be switched ON and OFF.
7.1 Drive Duty
Because the power for LCD driving is generated by the internal circuit of the CPU, there is no need to
provide for it externally. Driving is done by 1/16 duty or 1/8 duty dynamic drive through 4 electric
potentials (1/4 bias) : VL1, VL2, VL4, and VL5. The 5 electric potentials are entered in VL1, VL2, VL3, VL4 and
VL5 terminals and 1/5 bias driving may then be set.
Drive duty may be selected from the software. Dot number differences due to the selected duty are
shown in Table 7.1.1.
Table 7.1.1 Differences due to selected duty
Duty
Common terminal in use
Maximum dot number
Frame frequency *
1/16
COM0–15
640 dots
32 Hz
1/8
COM0–7
320 dots
32 Hz
Frame frequency = fOSC1/1,024
Figure 7.1.1 shows the drive waveform for 1/16 duty (1/5 bias), and Figure 7.1.2 shows the drive wave-
form for 1/8 duty (1/4 bias).
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