CLM920_AC5 Mini PCIE LTE Module Hardware Manual
Shanghai Yuge Information Technology co., LTD
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3.4.1 Boot sequence
Figure 3-7 Power-on sequence diagram
Table 3-5 Power-on sequence parameters
Symbol
Description
Min
Typical Max Unit
Ton
Start-up low-level width
100
500
-
mS
Ton(status) Boot time (judging by status)
22
-
-
S
Ton(usb)
Boot time (judgment based on usb status) -
20
-
S
Ton(uart)
Boot time (judgment based on uart status) -
20
-
S
VIH
PWRKEY input high level
0.6
0.8
1.8
V
VIL
PWRKEY input low
-0.3
0
0.5
V
3.4.2 Power off
If you want to shut down the CLM920_AC5 Mini PCIE module, you can cut off the VBAT
power supply. At this time, the module does not perform the normal shutdown process. Only
when the module works abnormally and cannot be restarted, it is recommended to restart the
module after power off.It is recommended that the interval between two restarts be greater
than 30s.
3.4.3 Reset control
The CLM920_AC5 Mini PCIE module PIN22 signal is the RESET reset pin. When the
application needs to reset the module, it can be reset by pulling this pin low for 150-450ms.
The RESET pin is sensitive to interference, keep away from radio frequency interference
signals when routing.
