TPM540 EVK
www.sercomm.com
DOC-669671v1
9
Cat-M1/NB1 Module
4.
Button introduce
4.1.
RECOVERY button:
This button is used to enter boot ROM mode for firmware upgrade and recovery system
when device cannot boot up by some reason.
Please visit Sercomm technical support website and issue a ticket when you have problem
with boot up your TPM540.
4.2.
WAKEUP button:
This button is connecting to PMU_WAKEUP ping and used to wakeup TPM540 while device is
under power saving mode.
When there is no traffic, TPM540 will get into power saving mode immediately and TPM540
cannot receive and deal any commands from host. Please push the button to wakeup
module and send AT commands.
4.3.
RESET button:
This button is connecting to PMU_SHUTDOWN pin for initiating power cycle that resets the
device or shutdowns device. (For reset function, please pull low button at least 100ms)
4.4.
STATUS button:
This button is connecting to PMU_POWER_BUTTON pin and it can be used to either go into
power down mode when device is awake or waking up the device from low power mode.
While PMU_SHUTDOWN and PMU_WAKEUP cause an immediate action,
PMU_POWER_BUTTON reaction is not immediate and involves SW response.
