Host/Module Communication Interface; Led Output - Sierra Wireless MC5720 Hardware Integration Manual
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Also See for MC5720:
- Hardware integration manual (39 pages) ,
- Quick start manual (15 pages)
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4: Host/Module Communication
Interface
Rev 0.92 Nov.05
This chapter provides information about the Host‐Module
communication interface (USB interface) and lists of extended
AT commands that may be useful for hardware integration
testing.
Note: On any given interface (USB, USIM/RUIM, etc.), leave unused
inputs and outputs as no-connects.
LED output
The module drives the LED output according to the PCI‐
Express MiniCard specification (summarized in Table 4‐1,
below).
Table 4-1: LED States
State
Indicates
OFF
Module is not
powered.
ON
Module is powered
and connected, but
not transmitting or
receiving.
Slow Blink
Module is powered
and searching for a
connection.
Intermittent
Module is transmitting
Blink
or receiving.
Characteristics
Light is turned off.
Light is turned on.
LED is flashing at a steady,
slow rate.
250 ms ± 25% ON period
•
0.2 Hz ± 25% blink rate
•
LED is flashing intermittently,
proportional to activity on the
interface.
•
50% duty cycle
•
3 Hz minimum blink rate
•
20 Hz maximum blink rate
4
17
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