Table of Contents
Advertisement
Serial ATA (SATA) Interface—Intel
Table 59.
SATA_RBIAS/SATA_RBIAS# Routing Summary
Trace Impedance
50 Ω ±15% (single
ended)
11.6
SATALED# Implementation
EP80579 provides a signal (SATALED#) to indicate SATA device activity. In order for
this signal to work in conjunction with Parallel ATA hard drives, it is recommended that
designers implement similar glue logic as illustrated in
When low, SATALED# indicates SATA device activity and must activate the hard drive's
LED. When tristated, the signal will not activate the LED. The hard drive LED is active
low.
Figure 103. SATALED# Circuitry Example
From IDE Connector
SATALED#
11.7
SATA Host Connector Placement Considerations
When placing SATA host connectors, applicable keep-out regions must be
comprehended in the layout of the board.
height required for bending the cable to a 90º bend. This can be used as an example
when considering height obstruction regions.
®
Intel
EP80579 Integrated Processor Product Line
Order Number: 320068-005US
®
EP80579 Integrated Processor Product Line
SATA_RBIAS/
SATA_RBIAS# Routing
Requirements
Short SATA_RBIAS and
SATA_RBIAS# pins at the
package.
Glue Logic
Vcc3_3
Maximum Trace
Length
A = 0.0" - 0.5"
(EP80579 to Resistor)
Figure
103.
Figure 104
shows an example cable and the
Signal
Signal
Length
Referencin
Matching
g
N/A
N/A
Hard Drive LED
May 2010
159
Advertisement
Table of Contents
