Power Down; Reset Control - YUGE CLM920 TD3 Usage Manual

CLM920 TD3 LTE Module Hardware Usage Guide

3.4.3 Power down

To shut down the CLM920 TD3 module, the shutdown can be controlled by the
PWRKEY pin. At this time, the module performs a normal shutdown process. The module can
also be shut down by AT command (this function is under development).

3.4.4 Reset control

The PIN20 signal of the CLM920 TD3 module is the RESET reset pin. When the
application detects a module error and the software does not respond, the module can be reset.
The module can be reset by pulling the pin low for 100-450ms. The pull-up resistor 10K to
VDD_EXT is recommended externally. The RESET pin is sensitive to interference. A 10nF to
0.1uF capacitor can be installed near the signal for signal filtering. Keep away from RF
interference signals when routing.
Pin Signal name
20 RESET
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Figure 3-8 Power-on reference circuit
Table 3-7 Reset foot definition
I/O
PI
Figure 3-9 Reset reference power
High value Description
1.8V±0.3V Active low
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