參數(shù)資料
型號： M38C89EFFP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PQFP144
封裝： 20 X 20 MM, 0.50 MM PITCH, PLASTIC, LQFP-144
文件頁數(shù)： 26/54頁
文件大?。?/td> 805K
代理商： M38C89EFFP
32
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C8 Group
Common Pin and Duty Ratio Control
The common pins (COM0–COM31) to be used are determined by
duty ratio.
Select duty ratio by the duty ratio selection bit (bit 0 of the LCD mode
register).
Table 9 Duty ratio control and common pins used
Duty
ratio
Common pins used
Note: The SEG0/COM16–SEG7/COM23 pins are used as the SEG0–SEG7.
The SEG67/COM24–SEG60/COM31 pins are used as the SEG67–SEG60.
COM0–COM15 (Note)
Duty ratio
selection bit
16
32
0
1
COM0–COM31
Fig. 30 LCD display RAM map
(frequency of count source for LCDCK)
(divider division ratio for LCD)
f(LCDCK)
(duty ratio)
LCD Display RAM
When LCD display RAM address selection bit is “0”, the area of ad-
dresses 034016 to 042F16 is the designated RAM for the LCD dis-
play. When the bit is “1”, the area of addresses 004016 to 012F16 is
the designated RAM for it. When “1”s are written to these addresses,
the corresponding segments of the LCD display panel are turned on.
LCD Drive Timing
The LCDCK timing frequency (LCD drive timing) is generated inter-
nally and the frame frequency can be determined with the following
equation;
f(LCDCK) =
Frame frequency =
S
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000000001000101110111110
0 01110010001011100000000 LSB
000000001101100100001000
0 1000
010001001000000000
000000001010100100001000
0 10000010001001000000000
000000001000100100001000
0 01110011111001000000000
000000001000100100001000
0 00001010001001000000000
000000001000100100001000
0 10001010001001000000000
000000001000101110001000
0 01110010001011100000000
000000000000000000000000
0 00000000000000000000000 MSB
010001011111001110001110
1 11110111110111110111100 LSB
011011000010010001010001
1 00000100000100000100010
010101000100010001010000
1 00000100000100000100010
010001000010001110010000
1 11100111100111100111100
010001000001010001010000
1 00000100000100000100000
010001010001010001010001
1 00000100000100000100000
010001001110001110001110
1 11110100000100000100000
000000000000000000000000
0 00000000000000000000000 MSB
0010001011111001
1 001000101111100 LSB
0011011000010010
0 101101101000000
0010101000100010
0 101010101000000
0010001000010001
1 101000101111000
0010001000001010
0 101000101000000
0010001010001010
0 101000101000000
0010001001110001
001000101000000
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM17
COM18
COM19
COM20
COM21
COM22
COM23
0000000000000000
0 000000000000000 MSB
0000000000100010
1 111101111000000 LSB
0000000000100010
1 000001000100000
0000000000010100
1 000001000100000
0000001110001000
1 111001111000000
0000000000010100
1 000001000000000
0000000000100010
1 000001000000000
0000000000100010
1 000001000000000
COM8
COM9
COM10
COM11
COM12
COM13
COM14
COM15
COM24
COM25
COM26
COM27
COM28
COM29
COM30
COM31
0000000000000000
0 000000000000000 MSB
LCD display map
When selecting 3 page
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COM16
When selecting 0 page
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