Texas Memory Systems XP-15 用户手册
PCI200 User Guide
Texas Memory Systems, Inc. (8/6/01)
C-2
3
ECHO
RO Indicates the XP-15 has returned an ECHO packet
2
SPR
RO Indicates the XP-15 has returned an SPR packet
1
DIAG
RO Indicates the XP-15 has returned a diagnostic packet
0
STAT
RO Indicates the XP-15 has returned a status packet
Low PCI SN command address register (32 bits, R/W)
Bit #
Name
Type Description
31-3
NA
R/W This register is used to establish the low 32-bits of the PCI
address for SN commands to the XP-15. This register consists
of the bottom 32-bits of a 32-bit counter with the low-order
three bits hardwired to zeroes. Transfers must begin on a
Double DWORD (64-bit) boundary.
2-0
Reserved
RO These bits are reserved (must be written with zeroes).
High PCI SN command address register (32 bits, R/W)
Bit #
Name
Type Description
63-32
NA
R/W Upper bits of this register are not used.
Low PCI SN response address register (32 bits, R/W)
Bit #
Name
Type Description
31-3
NA
R/W This register is used to establish the low 32-bits of the PCI
address for SN responses from the XP-15. This register
consists of the bottom 32-bits of a 32-bit counter with the low-
order three bits hardwired to zeroes. Transfers must begin
on a Double DWORD (64-bit) boundary.
2-0
Reserved
RO These bits are reserved (must be written with zeroes).
High PCI SN response address register (32 bits, R/W)
Bit #
Name
Type Description
63-32
NA
R/W Upper bits of this register are not used.