hd66421 Renesas Electronics Corporation., hd66421 Datasheet - Page 42
hd66421
Manufacturer Part Number
hd66421
Description
Ram-provided 160 Channel 4-level Grey Scale Driver For Dot Matrix Graphics Lcd
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66421.pdf
(46 pages)
- Current page: 42 of 46
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Plane Selection Register (R17): The plane
selection register (figure 46) controls general
operations of the HD66421. Each bit has its own
function as described below.
MON bit
MON = l: Monochrome display
MON = 0: 4-level gray scale display
Note
When you use the monochrome display, you have to initialize the x-address to even
number before access to display RAM. And you alway have to use even number.
Preliminary
Set value
Data bit
Figure 46 Plane Selection Register (R17)
7
6
5
42
DSEL bit
PSEL bit
4
DESL = 1: Plane 1 is displayed
DESL = 0: Plane 0 is displayed
PESL = 1: Access to plane 1 from CPU
PESL = 0: Access to plane 0 from CPU
3
MON
2
DSEL PSEL
1
0
HD66421
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