User's Manual

5
Rev 1.12.4 Oct.09 Proprietary and Confidential 35
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
5: Host / Module Interfaces
LED output
ThemoduledrivestheLEDoutputaccordingtothePCI‐
ExpressMiniCardspecification(summarizedinTable5‐1,
below).
Table 5-1: LED states
State Indicates Characteristics
Off
Module is not
powered.
Light is off.
On
Module is powered
and connected, but
not transmitting or
receiving.
Light is on.
Slow blink
Module is powered
and searching for a
connection.
LED is flashing at a
steady, slow rate.
• 250 ms ± 25% ON
period
• 0.2 Hz ± 25% blink
rate
Faster blink
Module is
transmitting or
receiving.
LED is flashing at a
steady, faster rate.
• Approximately 3 Hz
blink rate
Note: MC572x modules
support customer-defined
LED controls.