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See document [2] for details about AT+QPOWD.
.
NOTE
1. To avoid damaging internal flash, do not switch off the power supply when the module works
normally. Only after shutting down the module with PWRKEY or AT command can you cut off the
power supply.
2. When turning off module with the AT command, please keep PWRKEY at high level after the
execution of the command. Otherwise, the module will be turned on again after successfully
turn-off.
3.7. Reset
The module can be reset by driving the RESET_N low for at least 300 ms and then releasing it. The
RESET_N signal is sensitive to interference, so it is recommended to route the trace as short as possible
and surround it with ground.
Table 10: Pin Definition of RESET
Pin Name
RESET_N
The recommended circuit is equal to the PWRKEY control circuit. An open drain/collector driver or button
can be used to control the RESET_N.
≥ 300 ms
Reset pulse
Figure 13: Reference Circuit of RESET_N with Driving Circuit
UC200A-GL_Hardware_Design
Pin No.
I/O
20
DI
4.7K
Description
Reset the module
47K
UMTS/HSPA+ Module Series
Comment
1.8 V power domain.
Active low after turn-on.
RESET_N
32 / 78
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