Shenzhen Zhibotong Electronics Co., LTD
4.4 Introduction to hardware watchdog function
This hardware product is designed with a hardware watchdog function. The hardware watchdog
will automatically turn on after power-on, and detect the heartbeat level output by the routing
system that jumps once per second. If the routing system itself fails (such as a crash), it will also
Naturally, the heartbeat level can no longer be output. At this time, if the hardware watchdog does
not detect the heartbeat level within 120 seconds, it will shut down itself for 15 seconds and then
restart the entire system.
When the routing system is operating normally, but the 5G/4G module dialing is abnormal, the
routing system will control the power supply of the 5G/4G module through GPIO and let the
module automatically restart to fix the 5G/4G dialing abnormal problem.
Hardware watchdog specific functions
Routing system is abnormal
5 5G/4G mobile communication function
This product has a built-in M.2/MiniPCIE interface, which can be used to expand
5G/4G mobile communication functions. The built-in M.2/PCIE interface supports
USB3.0 and USB 2.0 buses. 5G mobile communication supports NSA or SA, and
which frequency bands are specifically supported by the selected 5G module. At
present, this product has completed the joint debugging with Fibocom's FM150 series
modules.
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