Neoway N720 - 2.9.1 FORCE_USB_BOOT

N720 Hardware User Guide
Copyright © Neoway Technology Co., Ltd 35
Falling time
CK2
1
-
100
ns
Rising time
CK3
1
-
100
ns
Duty ratio
CK4
15
-
85
%
Frequency error
CK5
-200
-
200
ppm
Input high level
CK6
1.45
-
2
V
Input low level
CK7
-0.3
-
0.35
V
2.9 Commissioning Interfaces
To facilitate software update and commissioning, reserve the commissioning interfaces.
2.9.1 FORCE_USB_BOOT
The module can enter the fast boot mode by connecting the FORCE_USB_BOOT pin to VDDIO_1P8V
during the startup. This is the last method to troubleshoot the abnormality that the module cannot start or
operation properly.
Figure 2-31 Reference design of the fast boot interface
FORCE_USB_BOOT
S1
VDDIO_1P8V
10 KΩ