HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 942
HD6417320
Manufacturer Part Number
HD6417320
Description
Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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Section 26
26.3.10 LCDC Horizontal Character Number Register (LDHCNR)
LDHCNR specifies the LCD module's horizontal size (in the scan direction) and the entire scan
width including the horizontal retrace period.
Notes: 1. The values set in HDCN and HTCN must satisfy the relationship of HTCN ≥ HDCN.
Rev. 3.00 Jan. 18, 2008 Page 880 of 1458
REJ09B0033-0300
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
2. Set HDCN according to the display resolution as follows:
Bit Name Initial Value R/W
HDCN7
HDCN6
HDCN5
HDCN4
HDCN3
HDCN2
HDCN1
HDCN0
HTCN7
HTCN6
HTCN5
HTCN4
HTCN3
HTCN2
HTCN1
HTCN0
1 bpp: (multiplex of 16) − 1 [1 line is multiplex of 128 pixel]
2 bpp: (multiplex of 8) − 1 [1 line is multiplex of 64 pixel]
4 bpp: (multiplex of 4) − 1 [1 line is multiplex of 32 pixel]
6 bpp/8 bpp: (multiplex of 2) − 1 [1 line is multiplex of 16 pixel]
LCD Controller (LCDC)
0
1
0
0
1
1
1
1
0
1
0
1
0
0
1
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Horizontal Display Character Number
Set the number of horizontal display characters (unit:
character = 8 dots).
Specify to the value of (the number of display
characters) -1.
Example: For a LCD module with a width of 640 pixels.
Horizontal Total Character Number
Set the number of total horizontal characters (unit:
character = 8 dots).
Specify to the value of (the number of total characters) -
1.
However, the minimum horizontal retrace period is three
characters (24 dots).
Example: For a LCD module with a width of 640 pixels.
HDCN = (640/8) -1 = 79 = H'4F
HTCN = [(640/8)-1] +3 = 82 = H'52
In this case, the number of total horizontal dots
is 664 dots and the horizontal retrace period is
24 dots.
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