參數(shù)資料
型號: TSB82AA2I
廠商: Texas Instruments, Inc.
英文描述: 1394b OHCI-LYNX CONTROLLER
中文描述: 的1394b OHCI的山貓控制器
文件頁數(shù): 19/104頁
文件大?。?/td> 461K
代理商: TSB82AA2I
27
Table 26. PCI 64-Bit Bus Extension Terminals
TERMINAL
I/O
DESCRIPTION
NAME
NO.
PCI_ACK64
72
I
PCI bus 64-bit transfer acknowledge. Asserted by a target if it is willing to accept a 64-bit data transfer when
it positively decodes its address for a memory transaction and the master has requested a 64-bit data transfer
by asserting PCI_REQ64. PCI_REQ64 has identical timing to PCI_DEVSEL. When the TSB82AA2 device is
bus master, it monitors PCI_REQ64 when it has requested a 64-bit data transfer for the current transaction.
If the target asserts PCI_REQ64 when it claims the cycle, then the TSB82AA2 device transfers data using
64 bits. As a target, the TSB82AA2 does not support 64-bit data transfers and never asserts PCI_REQ64 when
another master has requested 64-bit transfer.
PCI_AD63
PCI_AD62
PCI_AD61
PCI_AD60
PCI_AD59
PCI_AD58
PCI_AD57
PCI_AD56
PCI_AD55
PCI_AD54
PCI_AD53
PCI_AD52
PCI_AD51
PCI_AD50
PCI_AD49
PCI_AD48
PCI_AD47
PCI_AD46
PCI_AD45
PCI_AD44
PCI_AD43
PCI_AD42
PCI_AD41
PCI_AD40
PCI_AD39
PCI_AD38
PCI_AD37
PCI_AD36
PCI_AD35
PCI_AD34
PCI_AD33
PCI_AD32
82
83
84
85
88
89
90
92
94
95
96
97
98
99
100
101
104
105
106
107
108
109
110
111
113
114
115
116
118
119
120
121
I/O
PCI address/data bus for the upper DWORD. These signals make up the multiplexed PCI address and data
bus for the upper 32 bits of the PCI interface. During the address phase of a dual address command with
PCI_REQ64 asserted, AD63AD32 contain the upper 32 bits of a 64-bit address. During the data phase,
AD63AD32 contain data when a 64-bit transfer has been negotiated by the assertion of PCI_REQ64 by the
master and PCI_ACK64 by the target. Note, the TSB82AA2 does not support the dual address command.
PCI_C/BE7
PCI_C/BE6
PCI_C/BE5
PCI_C/BE4
74
77
78
79
I/O
PCI bus commands and byte enables for the upper DWORD. During the address phase of a bus cycle,
PCI_C/BE7PCI_C/BE4 are reserved and indeterminate since the TSB82AA2 does not support the dual
address command. During the data phase, this 4-bit bus is used as byte enables for the upper 32 bits when
a 64-bit transfer has been negotiated by the assertion of PCI_REQ64 by the master and PCI_ACK64 by the
target.
PCI_PAR64
80
I
PCI parity for the upper DWORD. In all PCI bus read and write cycles, the TSB82AA2 device calculates even
parity across the PCI_AD63PCI_AD32 and PCI_C/BE4PCI_C/BE7 buses. As an initiator during PCI cycles,
the TSB82AA2 device outputs this parity indicator with a one-PCI_CLK delay. As a target during PCI cycles,
the calculated parity is compared to the initiator parity indicator; a miscompare can result in a parity error
assertion (PCI_PERR).
PCI_REQ64
73
I
PCI bus request for 64-bit transfer. Asserted by a bus master to request a 64-bit transfer for a memory
transaction. The timing of PCI_REQ64 is identical to PCI_FRAME. When the TSB82AA2 device is the bus
master, it asserts PCI_REQ64 to request a 64-bit transfer on the current transaction. The TSB82AA2 device
only requests a 64-bit transfer for a memory transaction. The target asserts PCI_ACK64 if it is willing to transfer
data using 64 bits.
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