Renesas SH7781 User Manual
Page 938
19. Display Unit (DU)
Rev.1.00 Jan. 10, 2008 Page 908 of 1658
REJ09B0261-0100
19.3.41
Plane n Start Position Y Register (PnSPYR) (n
= 1 to 6)
The plane n start position Y registers (PnSPYR, n = 1 to 6) set the vertical start position of plane n
in memory. 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/W
R/W
R/W
R/W
R/W
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
PnSPY
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 16
⎯ All
0
R
⎯ Reserved
These bits are always read as 0. The write value
should always be 0.
15 to 0
PnSPY
Undefined R/W
Yes
Plane n Start Position Y
The vertical start position of plane n in memory
should be set in raster line units.
Note: Setting a value exceeding {twice the plane
n wrap-around start position Y
(PnWASPY) + twice the plane n wrap-
around memory width Y (PnWAMWY)} is
prohibited.