5 csr compare register, 6 csr control register – Texas Instruments TSB12LV26 User Manual
Page 45
4–7
4.5
CSR Compare Register
The CSR compare register is used to access the bus management CSR registers from the host through
compare-swap operations. This register contains the data to be compared with the existing value of the CSR
resource.
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Name
CSR compare
Type
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Default
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
CSR compare
Type
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Default
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Register:
CSR compare
Type:
Read-only
Offset:
10h
Default:
XXXX XXXXh
4.6
CSR Control Register
The CSR control register is used to access the bus management CSR registers from the host through compare-swap
operations. This register is used to control the compare-swap operation and to select the CSR resource. See
Table 4–5 for a complete description of the register contents.
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Name
CSR control
Type
RU
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Default
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
CSR control
Type
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R/W
R/W
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X
X
Register:
CSR control
Type:
Read/Write, Read/Update, Read-only
Offset:
14h
Default:
8000 000Xh
Table 4–5. CSR Control Register Description
BIT
FIELD NAME
TYPE
DESCRIPTION
31
csrDone
RU
This bit is set by the TSB12LV26 when a compare-swap operation is complete. It is cleared whenever
this register is written.
30–2
RSVD
R
Reserved. Bits 30–2 return 0s when read.
1–0
csrSel
R/W
This field selects the CSR resource as follows:
00 = BUS_MANAGER_ID
01 = BANDWIDTH_AVAILABLE
10 = CHANNELS_AVAILABLE_HI
11 = CHANNELS_AVAILABLE_LO