Rev. 3.0, 03/01, page 191 of 390
14.2.7
Command/Status Data Register (CSDR)
CSDR, a 32-bit Read/Write register, is a channel via which the system can write command data to
CODEC or read status data from CODEC. Bits 31-20 and bits 3-0 are reserved. The other bits are
initialized to 0 at reset. CDR is not initialized in STANDBY mode.
Bit
31
30
29
28
27
26
25
24
Bit Name
-
-
-
-
-
-
-
-
Initial Value
-
-
-
-
-
-
-
-
R/W
-
-
-
-
-
-
-
-
Bit
23
22
21
20
19
18
17
16
Bit Name
-
-
-
-
CD15/
SD15
CD14/
SD14
CD13/
SD13
CD12/
SD12
Initial Value
-
-
-
-
0
0
0
0
R/W
-
-
-
-
R/W
R/W
R/W
R/W
Bit
15
14
13
12
11
10
9
8
Bit Name
CD11/
SD11
CD10/
SD10
CD9/
SD9
CD8/
SD8
CD7/
SD7
CD6/
SD6
CD5/
SD5
CD4/
SD4
Initial Value
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
Bit
7
6
5
4
3
2
1
0
Bit Name
CD3/
SD3
CD2/
SD2
CD1/
SD1
CD0/
SD0
-
-
-
-
Initial Value
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
-
-
-
-
Bit
Description
Default
31 - 20
Reserved
-
19 - 4
Command/Status Data 15-0 (CD15-0): When this register is written, these bits will be
written to the first empty entry of CDR TX FIFO and then transmitted to the connected
CODEC in sequence.
When this register is read, the first non-empty entry of CDR RX FIFO will be read. The
data in this register reflects the status of the connected CODEC.
0
3 - 0
Reserved
0
Summary of Contents for HD64465
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