Fastrack Supreme User Guide
Functional Description
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Page: 54 / 77
7.5
General Purpose Input/Output (GPIO)
The FASTRACK Supreme provides two General Purpose Input / Output lines available for external use:
GPIO21 and GPIO25.
These GPIOs may be controlled by AT commands:
•
AT+WIOW
for a write access to the GPIO value, when the GPIO is used as an output,
•
AT+WIOR
for a read access to the GPIO value, when the GPIO is used as an input.
Refer to "AT Commands Interface Guide" [6] for further information on AT commands.
After reset, both GPIOs are configured as inputs. The
AT+WIOM
command has to be used to change this
configuration (refer to "AT Commands Interface Guide" [6] for further details).
Pin description
Signal
Power Supply
connector
(4-pin Micro-Fit)
I/O
I/O
Voltage
Reset
state
Description
Mulitplex with
GPIO21
3
I/O
2V8
Undefined
General Purpose I/O
No mux
GPIO25
4
I/O
2V8
Z
General Purpose I/O
INT1
Notes
:
•
The power supply cable may need to be modified due to the GPIO signals (GPIO21 & GPIO25)
available on the 4-pin Micro-FIT connector of the FASTRACK Supreme.
•
The previous generation M1306B have GPIO4 and GPIO5 being replaced by GPIO21 and GPIO25
respectively, for which
both are of LOW level at reset state
.
7.6
BOOT
This signal must not be connected. Its use is strictly reserved to Wavecom or competent retailers.
Caution: Previous generation M1306B has BOOT signal of HIGH level at 2.8V. But the FASTRACK
Supreme now of 1.8V BOOT instead.
7.7
RESET
7.7.1
General presentation
This signal is used to force a reset procedure by providing low level during at least 200 µs.
This signal must be considered as an emergency reset only. A reset procedure is automatically driven by an
internal hardware during the power-up sequence.