Rainbow Electronics W90P710CDG User Manual
Page 237
W90P710CD/W90P710CDG
Publication Release Date: September 19, 2006
- 237 -
Revision B2
6.9.3 SD Register Description
SD Gloal Control Register (SDGCR)
REGISTER
ADDRESS
R/W
DESCRIPTION
RESET VALUE
SDGCR
0xFFF0_7000
R/W
SD Global Control Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
RdSel
7
6
5
4
3
2
1
0
Reserved
WrSel DMARd
DMAWr SWRST SDEN
BITS
DESCRIPTIONS
[31:11]
Reserved
-
[10:8]
RdSel
Read Select
This field indicates which of DMA or SD host controller can read data
from buffer 0 or buffer 1.
3’b000: DMA can read buffer 0 (Default)
3’b011: SD host controller can read buffer 0
3’b100: DMA can read buffer 1
3’b111: SD host controller can read buffer 1
[6:4]
WrSel
Write Select
This field indicates which of DMA, SD host controller can write data into
buffer 0 or buffer 1.
3’b000: DMA can write buffer 0 (Default)
3’b011: SD host controller can write buffer 0
3’b100: DMA can write buffer 1
3’b111: SD host controller can write buffer 1