FUJITSU Semiconductor Controller MB89950/950A - Manual (Page 270)

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CHAPTER 12 LCD CONTROLLER/DRIVER
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LCD panel connections and display data example (1/3 duty ratio drive mode)
Figure 12.4-5 Segment/common connections, data states and corresponding display
COM2
SEG n+3
SEG n+2
SEG n
* 6
* 0
* 7
* 8
* 1
* 3
* 4
* 5
SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8
COM3
–– –– –– –– –– –– –– –– ––
COM2
0 1 1 0 0 1 0 1 1
COM1
1 0 1 0 0 1 1 1 0
COM0
1 1 1 0 0 1 0 1 1
064
H
065
H
066
H
067
H
068
H
COM0
COM1
SEG n+1
Display RAM
Segment No.
LCD Panel
Address
*0 to *8: Indicate corresponding display RAM bits. (Bits 3 and 7 and *2 are
not used.)
Address COM3 COM2 COM1 COM0
nH bit3 bit2 *2 bit1 *1 bit0 *0 SEGn
bit7 bit6 *5 bit5 *4 bit4 *3 SEGn+1
n+1H bit3 bit2 *8 bit1 *7 bit0 *6 SEGn+2
0: OFF
1: ON
Address COM3 COM2 COM1 COM0
064 H — 0 0 1 SEG0
— 1 1 1 SEG1
065 H — 0 1 0 SEG2
— 0 0 1 SEG3
066 H — 1 1 1 SEG4
— 0 1 0 SEG5
:Data in unit starting at bit 4
:Data in unit starting at bit 0
In 1/3 duty ratio operation, to be able to define two digits in three
bytes, the data stored in two bytes, with the first byte starting at bit 0,
and second byte starting at bit 4.
LCD Display
Bit States for Numerals "0" through "9"
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
— 1 0 1 — 0 1 1
— 0 1 1 — 1 1 1
— 1 1 1 — 1 0 1
— 0 0 0 — 0 0 0
— 0 0 0 — 1 1 1
— 1 1 1 — 0 0 0
— 1 1 1 — 0 1 0
— 0 1 0 — 1 0 1
— 1 0 1 — 1 1 1
— 1 1 1 — 0 0 0
— 0 0 0 — 1 1 1
— 1 1 1 — 1 1 1
— 0 1 0 — 0 0 1
— 0 0 1 — 1 1 1
— 1 1 1 — 0 1 0
— 1 1 1 — 0 0 1
— 0 0 1 — 1 1 0
— 1 1 0 — 1 1 1
— 1 1 1 — 0 1 1
— 0 1 1 — 1 1 0
— 1 1 0 — 1 1 1
— 0 0 1 — 0 0 1
— 0 0 1 — 1 1 1
— 1 1 1 — 0 0 1
— 1 1 1 — 0 1 1
— 0 1 1 — 1 1 1
— 1 1 1 — 1 1 1
— 1 1 1 — 0 0 1
— 0 0 1 — 1 1 1
— 1 1 1 — 1 1 1
Example) Using segments to represent "5".