hd66420 Renesas Electronics Corporation., hd66420 Datasheet - Page 9
hd66420
Manufacturer Part Number
hd66420
Description
Ram-provided 160 Channel 4-level Grey Scale Driver For Dot Matrix Graphics Lcd
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66420.pdf
(52 pages)
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System Description
The HD66420 can display a maximum of 160
scale or four colour LCD panel. Four levels of gray scale can be selected from 32-levels, so the appropriate
4-level gray scale can be displayed.
The HD66420 can reduce power dissipation without affecting display because data is retained in the
display RAM even during standby modes. An LCD system can be configured simply by attaching external
power supply, capacitors and resistors (figure 1) since the HD66420 incorporates power circuits.
MPU
8
COM1 to
COM40
Figure 1 System Block Diagram
CS
RS
RD
WR
DB7 to DB0
80 dots (ten 16x16-dot characters 5 lines) four-level gray
LCD panel
HD66420
SEG1 to
SEG160
COM41 to
COM80
DC/DC
Convertor
HD66420
9
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