I65/I56I HARDWARE DESCRIPTION VERSION
1.00
To avail of this feature you need to set the GPIO1 pin to mode 1 by using the
AT^SGPIO1
command. For details see [
When controlled from the GPIO1 pin the LED can display the functions listed
in table 16 below.
LED mode
Operating status
Off
I56/I56i is off or run in SLEEP or Alarm mode
600 ms On/600 ms Off No SIM card inserted or no PIN entered, or network search
in progress, or ongoing user authentication, or network login in
progress.
75 ms On/3 s
Off Logged to network (monitoring control channels and user
interactions). No call in progress.
75 ms on/75 ms Off/
75 ms On/3 s Off
One or more GPRS contexts activated.
Flashing
Indicates GPRS data transfer: When a GPRS transfer is in
progress, the LED goes on within 1 second after data packets
were exchanged. Flash duration is approximately 0.5 s.
On
Depending on type of call:
Voice call:
Connected to remote party.
Data call:
Connected to remote party or exchange of parameters
while setting up or disconnecting a call.
Table 16:
Coding of the status LED
_____________________________
LED Off = GPIO1 pin low.
LED On = GPIO1 pin high (
if LED is connected as illustrated in figure 12
)
To operate the LED a buffer, e.g. a transistor or gate, must be included in your
application. A sample configuration can be gathered from figure 17. Power
consumption in the LED mode is the same as for the synchronization signal
mode. For details see
7
, GPIO1 pin.
Figure 17:
LED Circuit (Example)
5.8.3 Behaviour of the RING_0 line (ASC0 interface)
The RING_0 line is available on the first serial interface (ASC0). The signal
serves to indicate incoming calls and other types of URCs (Unsolicited Result
Code). Although not mandatory for use in a host application, it is strongly
suggested that you connect the RING_0 line to an interrupt line of your
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