Sundance Spas ST201 User Manual
Page 109
109
Sundance Technology
ST201
PRELIMINARY draft 2
CONFIGSTATUS
Class....................PCI Configuration Registers, Configuration
Base Address ......PCI device configuration header start
Address Offset .....0x06
Access Mode .......Read/Write
Width ...................16 bits
This register is used to record status information for PCI bus events. Read/write bits in the register can
only be reset, not set, by writing to this register. Bits are reset by writing a one to that bit position.
BIT
BIT NAME
BIT DESCRIPTION
3..0
Reserved
Reserved for future use. Should be set to 0.
4
Capabilities
This read-only bit is always set, indicating the existence of a list of
extended capabilities registers. The CapPtr register points to the start
of the list.
6..5
Reserved
Reserved for future use. Should be set to 0.
7
FastBackToBack
This read-only bit, when set, indicates that the adapter, as a Target,
supports fast back-to-back transactions as defined by the criteria in the
section 3.4.2 of the PCI specification.
8
DataParityRe-
ported
The adapter sets this bit when, as a master, it detects the PERRN sig-
nal asserted, and the ParityErrorResponse bit is set in the ConfigCom-
mand register.
10..9
DevselTiming
This read-only field is used to encode the slowest time with which the
adapter asserts the DEVSELN signal. ST201-based adapters return
01b, indicating that they support “medium” speed DEVSELN assertion.
11
SignaledTargetA-
bort
The adapter sets this bit when it terminates a bus transaction with tar-
get-abort.
12
ReceivedTargetA-
bort
The adapter sets this bit when, operating as a bus master, its bus
transaction is terminated with target-abort.
13
ReceivedMaster-
Abort
The adapter sets this bit when, operating as a bus master, its bus
transaction is terminated with master-abort.
14
SignaledSystemEr-
ror
This bit is set whenever the adapter asserts SERRN.
15
DetectedParityEr-
ror
The adapter sets this bit when it detects a parity error, regardless of
whether parity error handling is enabled.