Neoway N715-EA - Sleep Mode Operation and Indicators

N715-EA Hardware User Guide
Chapter 5 Application Interfaces
Copyright © Neoway Technology Co., Ltd. All rights reserved.
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5.9.4 USB_BOOT
Signal
Pin
I/O
Function description
Remarks
USB_BOOT
55
DI
Forcible download/upgrade control pin
-
N715-EA provides a USB_BOOT pin. During development, USB_BOOT can force the module to boot
from USB port for firmware upgrade.
To force the module into emergency download mode, you can connect USB_BOOT of the module to
VDD_1P8 through a pull-up resistor in a short time during the module’s power-on process. This is the
last method to handle issues that result in startup or running failures. It is recommended to reserve this
pin to facilitate software upgrades and debugging. The following figure shows the reference design of
this pin. Adding an ESD component to protect USB_BOOT in the circuit is required.
Figure 5-44 Reference design of USB emergency download mode
N715-EA
Module
USB_BOOT
1kΩ
10kΩ
R1
R2
S1
D1
VDD_1P8
5.9.5 Keypad
N715-EA supports a 6x6 matrix keypad. The following shows the pin descriptions.
Signal
Pin
I/O
Function description
Remarks
USB_BOOT
55
DI
Key 0 of inputting
After the module is started, the
key is used for KEYIN0.
KEYIN1
129
DI
Key 1 of inputting
Leave this pin open if unused.
KEYIN2
128
DI
Key 2 of inputting
Leave this pin open if unused.
KEYIN3
127
DI
Key 3 of inputting
Leave this pin open if unused.
KEYIN4
126
DI
Key 4 of inputting
Leave this pin open if unused.
KEYIN5
125
DI
Key 5 of inputting
Leave this pin open if unused.