N27 Hardware User Guide
Chapter 4 Application Interfaces
Copyright © Neoway Technology Co., Ltd. All rights reserved.
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Figure 4-5 shows the hardware shutdown timing.
Figure 4-5 Shutdown timing
VBAT
PWRKEY_N
UART
TBD
2s
Software (standard) version: For how to shut down the module through software, see
Neoway_N27_AT_Command_Manual
.
Software (open) version: shutdown: can be configured by customers.
4.3 Peripheral Interfaces
N27 provides various peripheral interfaces.
In all reference designs of this section, the signals of pins on the module are named in perspective of
the module while peripheral pins are named from the view of the components. For example,
UART_TXD indicates the pin that the module sends data while MCU_RXD indicates the pin that MCU
receives data. These two pins should be connected.
Please note the signal naming of pins on the components in peripheral selection and design.
4.3.1 USB
Signal
Pin I/O
Function
Remarks
USB_VBUS 29
PI
USB voltage detection
4.75V<USB_VBUS<5.2V, typical value: 5V
USB_DM
30
AIO USB data negative signal
USB2.0 used to download the module
firmware
USB_DP
31
AIO USB data positive signal
The N27 module can be used as a USB device. It is an option for customers.
