Activity Indication; Sd/Mmc Support - Wavecom GR64 Application Note

4.2

Activity Indication

The LED signal can display Wireless CPU activity when its alternate function is
enabled. This signal has historically been connected to an LED to provide a visual
indication of Wireless CPU activity.
indications if an LED is connected:
LED indication
Off
On, steady
Slow flashing
Quick
flashing
Slow flashing is characterized by a 30 ms pulse with a 2-second period.
flashing is characterized by a 200 ms on pulse with a 400 ms period. The quick
flashing lasts for 10 seconds after the last SMS message was received.
The activity indication alternate function for the LED signal can be enabled or disabled
using the *E2LED AT command.
AT*E2LED=1 (enables LED activity)
OK
AT*E2LED=0 (disables LED activity)
OK
The LED activity indication function selection is saved in the profile.
selection can be retained across power downs if the AT&W command is used to save
the profile to non-volatile storage.
4.3

SD/MMC support

The GS64 Wireless CPU can act as either a secure digital (SD) or multimedia memory
card (MMC) bus host. I/O pins GPIO25-GPIO33 are currently permanently configured
for the SD/MMC alternate function and cannot be used as GPIO pins.
APPLICATION NOTE
GR/GS64 General Purpose and
Alternate Function I/O
Page: 9/13
Description
Wireless CPU not powered on.
Power is applied but the Wireless CPU is not registered on the
network. Corresponds to CREG conditions 0, 2, and 4.
The Wireless CPU is registered on the network. Corresponds to
CREG conditions 1,5.
The Wireless CPU has received an SMS message within the last
10 seconds.
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The following table describes the activity
Quick
The current