hd61603r ETC-unknow, hd61603r Datasheet - Page 8

• Manufacturer Part Number: hd61603r
• Description: Segment Type Lcd Driver
• Manufacturer: ETC-unknow

Reading Data from Display RAM: A display RAM segment address corresponds to a segment output.
The data at segment address SEGn is output to segment output SEGn terminal.
A common address corresponds to the output timing of a common output and a segment output. The same
common address data is simultaneously read. The data of display RAM is reproduced on the LCD panel.
When a 7-segment type LCD driver is connected, for example, the correspondence between the display
RAM and the display pattern in each mode is as follows:
1. Static drive
2. 1/2 duty cycle drive
In the static drive, only the column of COM0 of display RAM is output. COM1 to COM3 are not
displayed (Figure 2).
In the 1/2 duty cycle drive, the columns of COM0 and COM1 of display RAM are output in time
sharing. The columns of COM2 and COM3 are not displayed (Figure 3).
Figure 2 Example of Correspondence between LCD Connection and Display RAM
Figure 3 Example of Correspondence between LCD Connection and Display RAM
e
f
e
LCD connection
f
a
LCD connection
d
d
g
g
a
DP
c
DP
b
c
b
COM1
COM0
COM0
(1/2 Duty Cycle, HD61602)
(Static Drive, HD61602)
COM3
COM2
COM1
COM0
COM3
COM2
COM1
COM0
SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15
f
SEG4
a
f
e
SEG5
g
e
d
SEG6
Display RAM
Display RAM
c
d
c
SEG7
DP
DP
b
SEG8
g
SEG9
b
HD61602/HD61603
a
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