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WM_PRJ_Q24NG_PTS_002-001 June
2006
3.7 Reset signal (~RST)
This signal is used to force a reset procedure by providing low level during
at least 500 µs.
This signal has to be considered as an emergency reset only.
A reset procedure is already driven by an internal hardware during the
power-up sequence.
This signal can 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 can be left open. If used
(emergency reset), it has to be driven by an open collector or an open drain
output.
BOOT : Pin 12
∼
RST: Pin 14
Switch RESET
Figure 21:
∼
RST pin connection
Remark:
-Inside the Q24NG, there is a pull-up resistor of 100K connected to 2.8V
on the reset signal (
∼
RST).
Warning:
-It is not allowed to apply a voltage higher than 2.8V on the reset pin of
the Q24NG
•
If Switch RESET = 1,
∼
RST pin 14 = 0, for Q24NG Reset
•
If Switch RESET = 0,
∼
RST pin 14 = 1, for normal mode
3.8 External Interrupt (~INTR)
The Q24NG provides an external interrupt input (~INTR).
This input is very sensitive and an interrupt is activated on the high to low
edge.
If this signal is not used, it can be left open. If used this input has to be
driven by an open collector or an open drain.
This input is used, for example, to power OFF automatically the module.
