參數(shù)資料
型號(hào): M38C13M6-XXXFP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP64
封裝: 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64
文件頁(yè)數(shù): 26/59頁(yè)
文件大小: 704K
代理商: M38C13M6-XXXFP
Rev.2.40
Jun 14, 2004
page 32 of 56
38C1 Group
Fig. 31 Example of circuit at each bias
Table 8. Bias control and applied voltage to VL1–VL3
Bias value
1/3 bias
1/2 bias
1/1 bias
(static)
Voltage value
VL3=VLCD
VL2=2/3 VLCD
VL1=1/3 VLCD
VL3=VLCD
VL2=VL1=1/2 VLCD
VL3=VLCD
VL2=VL1=1/2 VSS
Note : VLCD is the maximum value of supplied voltage for the
LCD panel.
Bias Control and Applied Voltage to LCD
Power Input Pins
To the LCD power input pins (VL1–VL3), apply the voltage shown
in Table 8 according to the bias value.
Select a bias value by the bias control bit (bit 2 of the LCD mode
register).
Common Pin and Duty Ratio Control
The common pins (COM0–COM3) to be used are determined by
duty ratio.
Select duty ratio by the duty ratio selection bits (bits 0 and 1 of the
LCD mode register).
When the LCD enable bit is “0”, the output of COM0–COM3 is “L”
level.
Table 9. Duty ratio control and common pins used
Duty
ratio
1
2
3
4
Common pins used
Notes 1: Set COM1, COM2 and COM3 to be open.
2: Set COM2 and COM3 to be open.
3: Set COM3 to be open.
Bit 1
0
1
Bit 0
0
1
0
1
COM0 (Note 1)
COM0, COM1 (Note 2)
COM0–COM2 (Note 3)
COM0–COM3
Duty ratio selection bits
R4
R5
R4 = R5
R1
R2
R3
R1 = R2 = R3
VL3
VL2
VL1
VL3
VL2
VL1
VL3
VL2
VL1
1/3 bias
1/1 bias (static)
Contrast control
1/2 bias
Contrast control
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