Product Info

NB-IoT Module Series
BC660K-GL Hardware Design
BC660K-GL_Hardware_Design
3-24
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“*” means under development.
3.6. Power-up/Power-down Scenarios
3.6.1. Power-up
After the module VBAT is powered on, keep the RESET_N and BOOT inputs not being pulled down, and
the module can turn on automatically. The power-up timing is illustrated in the following figure.
Figure 6: Power-up Timing
1. After the VBAT is powered down, its voltage must be lower than 0.7 V. The specific discharge time
needs to be evaluated based on the actual circuit test, and enough margin is left to avoid abnormal
startup when the it is powered on again.
2. The power-up time of VBAT must be within 10 ms.
3. It is recommended that the MCU retain the RESET_N control pin. When the abnormal power-on
sequence causes the module to start abnormally, the RESET_N control pin can control the module to
reset to exit the abnormal state.
4. After VBAT is powered on, RESET_N and BOOT automatically rise to high level due to internal
pull-ups.
NOTES
NOTE