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H330S Hardware User Manual
Page 31 of 44
5.3.3 WAKE_UP Signal
WAKE_UP is for waking up the module from Sleep mode, it is high level by default, but low level is
activated.
Module Mode
WAKE_UP Signal
Description
Sleep
Low level
Wake up the module from Sleep mode to Idle mode
High level
Keep the module in Sleep mode
Idle/Call
Low/High level
Keep the module in Idle/Call mode
When the module is in Sleep mode, the function of EINT1/WAKE_UP signal is as follows:
When EINT1/WAKE_UP is at low level under the control of MCU GPIO, it will wake up the module to idle
mode.
When EINT1/WAKE_UP is at high level under the control of MCU GPIO, it will keep the module in sleep
mode.
5.3.4 Other Work Indications
Pin Name
Electrical Level
Description
VTRX
1.8V
Work indication of RF Transceiver PMU
VPA
0-5V
In transmission, output VCC; 0.65V at the lowest power; 5V at the
largest power; 0V in the case of no transmission
Note:
It is only used for indicating work conditions. Keep it in the idle state in actual use. It cannot be
used for other purposes.
