Product Info

LP
WA Module Series
BG95 Series Hardware Design
BG95_S
eries_Hardware_Design 57 / 106
2. “*” m
eans under development.
3.16. US
B_BOOT Interface
BG95 prov
ides a USB_BOOT pin. During development or factory production, USB_BOOT can force the
module to boot from USB port for firmware upgrade.
Table 22: Pin Definition of USB_BOOT Interface
The following figure shows a reference circuit of USB_BOOT interface.
Figur
e 23: Reference Design of USB_BOOT Interface
The following figure shows the timing of USB_BOOT.
Pin N
ame
Pin N
o.
I/
O
De
scription
Com
ment
USB_
BOOT
75 DI
Force t
he module into emergency
download mode
1.8 V power domain.
Active high.
If unused, keep it open.