Freescale Semiconductor MPC8260 Benutzerhandbuch
PCI Bridge
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Freescale Semiconductor
9-61
9.11.2.25 PCI Hot Swap Control Status Register
describe the Hot Swap control status register.
Figure 9-57. Hot Swap Control Status Register
Table 9-43. Hot Swap Register Block Field Descriptions
Bits
Name
Description
31–24
—
Reserved. Should be cleared.
23–16
HS_CSR
Hot Swap control status register; see
15–8
NXT_PTR
Next pointer—an offset into the device’s PCI configuration space for the location
of the next item in the capabilities linked list. A value of 0x00 indicates that this is
the last item in the list.
of the next item in the capabilities linked list. A value of 0x00 indicates that this is
the last item in the list.
7–0
CAP_ID
CompactPCI ® Hot Swap capability ID (read only).
23
22
21
20
19
18
17
16
Field
INS
EXT
—
LOO
—
EIM
—
Reset
0000_0000
R/W
R/W
Addr
0x4A
Table 9-44. Hot Swap Control Status Register Field Descriptions
Bit
Name
Description
23
INS
ENUM status: insertion. Write a ‘1’ to clear this bit.
0 ENUM is not asserted
1 ENUM is asserted
0 ENUM is not asserted
1 ENUM is asserted
22
EXT
ENUM status: extraction. Write a ‘1’ to clear this bit.
0 ENUM is not asserted
1 ENUM is asserted
0 ENUM is not asserted
1 ENUM is asserted
21–20
—
Reserved. Should be cleared.
19
LOO
LED on/off when the hardware is in state H2. Read/write-able.
0 LED off
1 LED on
0 LED off
1 LED on
18
—
Reserved. Should be cleared.
17
EIM
ENUM signal mask. Read/write-able.
0 Enable signal
1 Mask signal
0 Enable signal
1 Mask signal
16
—
Reserved. Should be cleared.