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參數(shù)資料
| 型號： | SBPH400-3 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | IEEE1394 3-Port 400Mbps Physical Layer |
| 中文描述： | IEEE1394連接3端口400Mbps的物理層 |
| 文件頁數(shù)： | 11/43頁 |
| 文件大?。?/td> | 285K |
| 代理商： | SBPH400-3 |
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SBPH400-3
11/43
If the request for transmit comes from the local link, then the arbitration control logic waits for
an appropriate gap (all interfaces Idle), and then (unless the request is an immediaterequest)
arbitrates as above.
The arbitration logic supports all the arbitration enhancements specified in IEEE P1394a:-
arbitrated reset (a short reset which is delayed until a subaction gap arbitration)
ack-accelerated arbitration (immediate arbitration after an ACK)
fly-by arbitration (concatenation of packets after a packet received from a child
port)
2.7
PHY packets
2.7.1 Link device interaction
The SBPH400 will forward to the link (if the PHY/Link interface is active) every PHY packet
received on the bus.
The SBPH400 will interpret every PHY packet which it receives from the local link device for
transmission on the bus (in addition to responding to every PHY packet received from the bus).
The SBPH400 will act on it in exactly the sameway as if the packet wasreceived from the bus.
2.7.2 Self-ID packet
The Self-ID packet has the following format:
Figure 2.2
Self-ID packet format
1 0
phy_ID
0 L
gap_cnt
sp
c
pwr
p0
p1
p2
i
0
logical inverse of first quadlet
rsv
2
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