EW31244SL7QV Datasheet, PDF (50/252 Pages) Intel Corporation – Intel® 31244 PCI-X to Serial ATA Controller

Intel^® 31244 PCI-X to Serial ATA Controller
Functional Blocks
4.1.1 Out-of-Band Signaling
Figure 15.
There are three Out-Of-Band (OOB) signals defined as part of the Analog Front End (AFE) layer
of the PHY block:
• COMRESET
• COMINIT
• COMWAKE
These OOB signals are internal output from the receive AFE portion of the PHY and they are
generated based on the detection of burst patterns of ALIGN primitives. Figure 15 shows a block
diagram of the AFE cabling and the origin of the OOB signals.
Analog Front End (AFE) Cabling and OOB Signals
Figure 16.
COMRESET and COMINIT have the same burst characteristics except that COMRESET
originates from the host controller whereas COMINIT originates from the device. COMWAKE is
different from COMRESET and COMINIT by having a different idle duration between bursts.
Figure 16 shows the burst patterns timings.
OOB Signals Timings
COMRESET / COMINIT
106.7 ns
320 ns
COMWAKE
106.7 ns
106.7 ns
B1398-01
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April 2004
Developer’s Manual