Renesas SH7781 用户手册
20. Graphics Data Translation Accelerator (GDTA)
Rev.1.00 Jan. 10, 2008 Page 989 of 1658
REJ09B0261-0100
20.3.11
GA Buffer RAM 1 Data Alignment Register (DID_CTL)
DID_CTL is in the GDTA common register block and specifies data alignment of the data stored
in buffer RAM 1.
in buffer RAM 1.
16
17
18
19
20
21
22
23
24
25
26
27
28
29
31
30
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
BIt:
Initial value:
R/W:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
15
14
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
DID_DTUA
DID_DTSA
DID_
DTAM
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
R/W
R/W
R/W
R/W
R/W
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
BIt:
Initial value:
R/W:
Bit Bit
Name
Initial
Value R/W Description
Value R/W Description
31 to 5
⎯ All
0
⎯ Reserved
These bits are always read as 0. The write value should
always be 0.
always be 0.
4 DID_DTAM
0 R/W
Specifies
data alignment conversion mode
0: Data alignment is performed using an endian signal
1: Data alignment is performed using the DID_CTL
register setting
3, 2
DID_DTSA
0
R/W
Specifies the data size for data alignment conversion.
00: No conversion
01: 64 bits
10: 32 bits
11: 16 bits
1, 0
DID_DTUA
0
R/W
Specifies the unit for data alignment conversion.
00: No conversion
01: 8 bits
10: 16 bits
11: 32 bits
Note: For details of data alignment conversion patterns, refer to section 20.6, Data Alignment.