82NM10 Datasheet, PDF (520/671 Pages) Intel Corporation – Intel® NM10 Family Express Chipset

EHCI Controller Registers (D29:F7)
16.1.4
Note:
PCISTS—PCI Status Register
(USB EHCI—D29:F7)
Address Offset: 06h–07h
Default Value: 0290h
Attribute:
Size:
R/W, RO
16 bits
For the writable bits, software must write a 1 to clear bits that are set. Writing a 0 to
the bit has no effect.
Bit
Description
15
14
13
12
11
10:9
8
7
6
5
4
3
2:0
Detected Parity Error (DPE) — RO. Hardwired to 0.
Signaled System Error (SSE) — R/W.
0 = No SERR# signaled by Chipset.
1 = This bit is set by the Chipset when it signals SERR# (internally). The SER_EN bit
(bit 8 of the Command Register) must be 1 for this bit to be set.
Received Master Abort (RMA) — R/W.
0 = No master abort received by EHC on a memory access.
1 = This bit is set when EHC, as a master, receives a master abort status on a memory
access. This is treated as a Host Error and halts the DMA engines. This event can
optionally generate an SERR# by setting the SERR# Enable bit.
Received Target Abort (RTA) — R/W.
0 = No target abort received by EHC on memory access.
1 = This bit is set when EHC, as a master, receives a target abort status on a memory
access. This is treated as a Host Error and halts the DMA engines. This event can
optionally generate an SERR# by setting the SERR# Enable bit (D29:F7:04h, bit
8).
Signaled Target Abort (STA) — RO. This bit is used to indicate when the EHCI
function responds to a cycle with a target abort. There is no reason for this to happen,
so this bit will be
hardwired to 0.
DEVSEL# Timing Status (DEVT_STS) — RO. This 2-bit field defines the timing for
DEVSEL# assertion.
Master Data Parity Error Detected (DPED) — R/W.
0 = No data parity error detected on USB2.0 read completion packet.
1 = This bit is set by the Chipset when a data parity error is detected on a USB 2.0 read
completion packet on the internal interface to the EHCI host controller and bit 6 of
the Command register is set to 1.
Fast Back to Back Capable (FB2BC) — RO. Hardwired to 1.
User Definable Features (UDF) — RO. Hardwired to 0.
66 MHz Capable (66 MHz _CAP) — RO. Hardwired to 0.
Capabilities List (CAP_LIST) — RO. Hardwired to 1 indicating that offset 34h
contains a valid capabilities pointer.
Interrupt Status — RO. This bit reflects the state of this function’s interrupt at the
input of the enable/disable logic.
0 = This bit will be 0 when the interrupt is de-asserted.
1 = This bit is a 1 when the interrupt is asserted.
The value reported in this bit is independent of the value in the Interrupt Enable bit.
Reserved
520
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