13 horizontal cycle register (hcr) – Renesas SH7781 User Manual
Page 898
19. Display Unit (DU)
Rev.1.00 Jan. 10, 2008 Page 868 of 1658
REJ09B0261-0100
19.3.13
Horizontal Cycle Register (HCR)
The horizontal cycle register (HCR) sets the horizontal scan cycle.(period). The value is retained
during power-on reset and manual reset.
R/W:
Internal update:
R/W:
Internal update:
16
17
18
19
20
21
22
23
24
25
26
27
28
29
31
30
Bit:
Initial value:
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
O
O
O
O
O
O
O
O
O
O
O
—
—
—
—
—
—
—
—
—
—
—
0
0
0
0
0
HC
—
—
—
—
—
0
1
2
3
4
5
6
7
8
9
10
11
12
13
15
14
Bit:
Initial value:
Bit Bit
Name
Initial
Value R/W
Internal
Update Description
31 to 11
⎯ All
0
R
⎯ Reserved
These bits are always read as 0. The write value
should always be 0.
10 to 0
HC
Undefined R/W
Yes
Horizontal Cycle
One horizontal scan period, including the
horizontal blanking interval, should be set in dot
clock units.
When in TV sync mode, this register should be
set so that the HSYNC period determined by this
register is the same as or greater than the
EXHSYNC period.