LPC Interface Bridge Registers (D31:F0)
9-10
Intel
82801BA ICH2 Datasheet
9.1.19
D31_ERR_CFG—Device 31 Error Configuration Register
(LPC I/F—D31:F0)
Offset Address:
Default Value:
Lockable:
88h
00h
No
Attribute:
Size:
Power Well:
R/W
8-bit
Core
This register configures the ICH2’s Device 31 responses to various system errors. The actual
assertion of SERR# is enabled via the PCI Command register
.
9.1.20
D31_ERR_STS—Device 31 Error Status Register
(LPC I/F—D31:F0)
Offset Address:
Default Value:
Lockable:
8Ah
00h
No
Attribute:
Size:
Power Well:
R/WC
8-bit
Core
This register configures the ICH2’s Device 31 responses to various system errors. The actual
assertion of SERR# is enabled via the PCI Command register.
Bit
Description
7:3
Reserved.
2
SERR# on Received Target Abort Enable (SERR_RTA_EN)
—R/W.
1 = The ICH2 will generate SERR# when SERR_RTA is set if SERR_EN is set.
0 = Disable. No SERR# assertion on Received Target Abort.
1
SERR# on Delayed Transaction Time-out Enable (SERR_DTT_EN)
—R/W.
1 = The ICH2 will generate SERR# when SERR_DTT bit is set if SERR_EN is set.
0 = Disable. No SERR# assertion on Delayed Transaction Time-out.
0
Reserved
Bit
Description
7:3
Reserved.
2
SERR# Due to Received Target Abort (SERR_RTA)
—R/WC.
1 = The ICH2 sets this bit when it receives a target abort. If SERR_EN, the ICH2 will also generate
an SERR# when SERR_RTA is set.
0 = Software clears this bit by writing a 1 to the bit location.
1
SERR# Due to Delayed Transaction Time-out (SERR_DTT)
—R/WC.
1 = When a PCI master does not return for the data within 1 ms of the cycle’s completion, the ICH2
clears the delayed transaction and sets this bit. If both SERR_DTT_EN and SERR_EN are set,
then ICH2 will also generate an SERR# when SERR_DTT is set.
0 = Software clears this bit by writing a 1 to the bit location.
0
Reserved.
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