SH7205 Datasheet, PDF (1388/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 26 2D Graphics Engine (2DG)
26.3.9 Destination C Write Area Setting Register for Blitter (GR_DCSET)
The register GR_DCSET sets the DC area. In a DMA transfer, the total number of pixels to be
transferred to the external memory space is obtained by DCWIDH × DCHIGH.
Bit: 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
-
-
-
-
-
-
-
DCHIGH
Initial value: -
-
-
-
-
-
-
0
0
0
0
0
0
0
0
0
R/W: R
R
R
R
R
R
R R/W R/W R/W R/W R/W R/W R/W R/W R/W
Bit: 15 14
-
-
Initial value: -
-
R/W: R
R
13 12
-
-
-
-
R
R
11 10
-
-
-
-
R
R
9
8
7
6
5
4
3
2
1
0
-
DCWIDH
-
0
0
0
0
0
0
0
0
1
R R/W R/W R/W R/W R/W R/W R/W R/W R/W
Bit
Bit name
31 to 25 
24 to 16 DCHIGH
15 to 9 
8 to 0 DCWIDH
Initial
Value
R/W
Undefined R
H'000
R/W
Undefined R
H'001
R/W
Description
Reserved
The read value is undefined. The write value should
always be 0.
DC Area Vertical Setting
These bits set the vertical height (number of lines) of
the rectangular area (DC area) to be transferred.
Valid range: 1 to 288 lines
Reserved
The read value is undefined. The write value should
always be 0.
DC Area Horizontal Setting
These bits set the horizontal width (number of pixels)
of the rectangular area (DC area) to be transferred.
Valid range: 1 to 511 pixels
• If the pixel format is set to αRGB444 or αRGB555, only 16-bit access is enabled when the
total number of pixels to be transferred (DCWIDH × DCHIGH) is odd; both 32-bit and 16-bit
accesses are enabled when the value of DCWIDH × DCHIGH is even.
Rev. 1.00 Mar. 25, 2008 Page 1356 of 1868
REJ09B0372-0100