參數(shù)資料
型號: XRS10L120
廠商: Exar Corporation
英文描述: SERIAL ATA II: 1:2 PORT MULTIPLIER
中文描述: 串行ATA II:1:2端口倍增器
文件頁數(shù): 9/52頁
文件大小: 399K
代理商: XRS10L120
PRELIMINARY
XRS10L120
7
REV. P1.0.1
SERIAL ATA II: 1:2 PORT MULTIPLIER
2.1
Out of Band Feature
Each Serial ATA link provides full support for the three Out Of Band (OOB) signals supported by Serial ATA:
COMRESET, COMINIT and COMWAKE. These sequences must be separated by idle periods as shown in
Figure 5
. The sequences are comprised of 106.7ns bursts of activity that are interleaved with varying length
stretches of electrical idle. This alternating sequence must be repeated four times to be recognized.
An example OOB sequence and the resulting burst and idle widths are shown in
Figure 6
. If the sequence of
burstWidth and idleWidth counts falls within the range specified in the MDIO registers for four consecutive
burst/idle sequences, then the link will assert COMINIT or COMWAKE. This OOB signal will remain asserted
for as long as the corresponding sequence on the input pins continues.
F
IGURE
5. COMWAKE
AND
COMRESET/COMINIT S
EQUENCES
F
IGURE
6. E
XAMPLE
OOB S
EQUENCE
COMWAKE
COMRESET
COMINIT
106.7ns
106.7ns
320ns
rxdP, rxdN
squelchClock
15
15
15
COMINT = (MaxBurstWidth
burstWidth
MinBurstWidth) && (MaxInitWidth
idleWidth
MinInitWidth)
COMWAKE = (MaxBurstWidth
burstWidth
MinBurstWidth) && (MaxWakeWidth
idleWidth3MinWakeWidth)
17
17
17
idleWidth
burstWidth
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