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Quectel BC66 - Page 18

Quectel BC66
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NB-IoT Module Series
BC66&BC660K-GL Compatible Design
BC66&BC660K-GL_Compatible_Design 17 / 30
An open drain/collector driver or a button can be used to control the BOOT pin for BC660K-GL and the
PWRKEY pin for BC66.
BC660K-GL BOOT
S1
Close to S1
TVS
BC66 PWRKEY
Figure 4: Compatible Reference Design for BOOT/PWRKEY Controlled with a Button
The turn-on timing of BC66 and BC660K-GL is illustrated below.
VBAT
VDD_EXT
PWRKEY
BC66
OFF
BOOTING
RUNNING
BC66: 42 ms
BC66 500 ms
RESET_N/BOOT
OFF
BOOTING
RUNNING
BC660K-GL
VBAT
VDD_EXT
BC660K-GL ˃ 500 ms
Figure 5: BC66 & BC660K-GL Turn-on Timing
1. For BC66: Ensure that VBAT_ BB and VBAT_RF are stable before driving low PWRKEY to turn on
NOTES

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