N21 EVK
User Guide
Copyright © Neoway Technology Co., Ltd
2
1.1 EVB Functions
Figure 1-1 N21 EVB
N21 EVB provides the following interfaces and buttons:
No. Interface/Button
Description
1
5V adapter interface
5V DC power supply. Push the switch to ON, and LDO outputs 3.8V to
supply power for the module.
2
N21 module
/
3
UART interface
Interface for N21 to communicate with a computer or peripherals to
commission AT commands.
N21 EVB already embeds a level shifter for UART.
4, 5 SIM Card connector
Two SIM card holders
Choose one based on the SIM card type.
6
PWRKEY button
After supplying power to the module, hold this button for more than 1.2
second to start the module
Hold this button for more than 2 seconds when the module is running,
