參數(shù)資料
型號: DS3131
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: Telecom IC:Other
英文描述: SPECIALTY TELECOM CIRCUIT, PBGA256
封裝: 27 X 27 MM, PLASTIC, BGA-256
文件頁數(shù): 31/174頁
文件大?。?/td> 1261K
代理商: DS3131
DS3131
126 of 174
10.1.7
PCI Target Abort
Targets can also abort the current transaction, which means they do not wish for the initiator to attempt
the request again. No data is transferred in a target abort scenario. A target abort is signaled to the
initiator by the simultaneous assertion of PSTOP and deassertion of PDEVSEL (Figure 10-8). When
BoSS is a target, it only issues a target abort when the host is accessing the local bus. This occurs when
the host attempts a bus transaction with a combination of byte enables (PCBE) that are not supported by
the local bus. If such a scenario occurs, it reports through the target-abort-initiated status bit in the PCI
command/status configuration register (Section 10.2). See Section 11.1 for details about local bus
operation. When BoSS is a bus master, if it detects a target abort, it reports through the target abort
detected by master status bit in the PCI command/status configuration register (Section 10.2).
Figure 10-8. PCI Target Abort
1
234
567
8910
PCLK
PFRAME
PSTOP
PDEVSEL
PTRDY
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