Fastrack Supreme User Guide
Functional Description
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This signal may also be used to provide a reset to an external device. It then behaves as an output. If no
external reset is necessary, this input may be left open, if used (emergency reset), it has to be driven either
by an open collector or an open drain output:
•
RESET pin 14 = 0, for FASTRACK Supreme Reset,
•
RESET pin 14 = 1, for normal mode.
Pin description
Signal
Sub HD 15-Pin connector
Pin number
I/O
I/O type
Voltage
Description
RESET
14
I/O
Open Drain
1V8
FASTRACK Supreme
Reset
Caution: Previous generation M1306B has RESET signal of HIGH level at 2.8V. But the FASTRACK
Supreme now of 1.8V RESET instead.
Additional comments on RESET:
The RESET process is activated either by the external RESET signal or by an internal signal (coming from a
RESET generator). This automatic reset is activated at Power-up.
The FASTRACK Supreme remains in RESET mode as long as the RESET signal is held low.
Caution:
This signal should be used only for "emergency" reset
.
A software reset is always preferred to a hardware reset.
Note
: See "AT Commands Interface Guide" [6] for further information on software reset.
7.7.2
Reset Sequence
To activate the "emergency" reset sequence, the RESET signal has to be set to low for 200
μ
s minimum.
As soon as the reset is done, the AT interface answers "OK" to the application. For this, the application must
send
AT
↵
.
If the application manages hardware flow control, the AT command may be sent during the initialization
phase. Another solution is to use the
AT+WIND
command to get an unsolicited status from the FASTRACK
Supreme.
For further details, refer to AT commands "AT Commands Interface Guide" [6].