參數(shù)資料
型號： M37560MF-XXXGP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP100
封裝： 14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100
文件頁數(shù)： 40/90頁
文件大小： 1682K
代理商： M37560MF-XXXGP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
7560 Group
44
LCD DRIVE CONTROL CIRCUIT
The 7560 group has the Liquid Crystal Display (LCD) drive control
circuit consisting of the following.
LCD display RAM
Segment output enable register
LCD mode register
Voltage multiplier
Selector
Timing controller
Common driver
Segment driver
Bias control circuit
A maximum of 40 segment output pins and 4 common output pins
can be used.
Up to 160 pixels can be controlled for LCD display. When the LCD
Fig. 46 Structure of segment output enable register and LCD mode register
enable bit is set to “1” (LCD ON) after data is set in the LCD mode
register, the segment output enable register and the LCD display
RAM, the LCD drive control circuit starts reading the display data
automatically, performs the bias control and the duty ratio control,
and displays the data on the LCD panel.
Table 11 Maximum number of display pixels at each duty ratio
Duty ratio
Maximum number of display pixel
80 dots
or 8 segment LCD 10 digits
120 dots
or 8 segment LCD 15 digits
160 dots
or 8 segment LCD 20 digits
2
3
4
Segment output enable bit 0
0 : Output ports P30–P35
1 : Segment output SEG18–SEG23
Segment output enable bit 1
0 : Output ports P36, P37
1 : Segment output SEG24,SEG25
Segment output enable bit 2
0 : I/O ports P00–P05
1 : Segment output SEG26–SEG31
Segment output enable bit 3
0 : I/O ports P06,P07
1 : Segment output SEG32,SEG33
Segment output enable bit 4
0 : I/O port P10
1 : Segment output SEG34
Segment output enable bit 5
0 : I/O ports P11–P15
1 : Segment output SEG35–SEG39
LCD output enable bit
0 : Disabled
1 : Enabled
Not used (“0” at reading)
(Write “0” to this bit at writing.)
Segment output enable register
(SEG : address 003816)
b7
b0
LCD mode register
(LM : address 003916)
Duty ratio selection bits
b1b0
0 0 : Not used
0 1 : 2 duty (use COM0, COM1)
1 0 : 3 duty (use COM0–COM2)
1 1 : 4 duty (use COM0–COM3)
Bias control bit
0 : 1/3 bias
1 : 1/2 bias
LCD enable bit
0 : LCD OFF
1 : LCD ON
Voltage multiplier control bit
0 : Voltage multiplier disable
1 : Voltage multiplier enable
LCD circuit divider division ratio selection bits
b6b5
0 0 : Clock input
0 1 : 2 division of Clock input
1 0 : 4 division of Clock input
1 1 : 8 division of Clock input
LCDCK count source selection bit (Note)
0 : f(XCIN)/32
1 : f(XIN)/8192 (f(XCIN)/8192 in low-speed mode)
Note : LCDCK is a clock for a LCD timing controller.
b7
b0
0
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