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CHAPTER 12 LCD CONTROLLER/DRIVER
●
8-segment LCD panel connections and display data (1/4 duty ratio drive mode)
Figure 12.4-7 Segment/common connections, data states and corresponding display
COM2
SEGn
*
7
*
0
*
3
*
6
*
1
*
4
*
5
*
2
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
COM3
1
1
1
1
0
1
1
1
COM2
1
1
0
1
1
1
1
1
COM1
1
0
0
0
1
1
0
1
COM0
1
1
0
0
0
1
0
1
064
H
065H
066H
067H
COM0
COM1
SEG
n+1
COM3
LCD Panel
Display RAM
Address
Segment No.
*0 to *7: Indicate corresponding display RAM bits.
Address COM3 COM2 COM1 COM0
nH
bit3
*3
bit2
*2
bit1
*1
bit0
*0
SEGn
bit7
*7
bit6
*6
bit5
*5
bit4
*4
SEGn+1
0: OFF
1: ON
Address COM3 COM2 COM1 COM0
064
H
1 101SEG0
0 011SEG1
LCD
Display
Bit States for Numerals "0" through "9"
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
11011111
11001000
11110110
11111100
11101001
01111101
01111111
11011001
11111111
11111101
Example) Using segments to represent "5".