Ebyte E52-400/900NW22S - Pin Definition Table

Chengdu Ebyte Electronic Technology Co.,Ltd.. E52-400/900NW22S User Manual
CopyriCopyright ©2012–2023, Chengdu Ebyte Electronic Technology Co.,Ltd.
6
Pin
number
Pin
name
Pin direction
Pin usage
1
PB3
Input / Output
Some function indication pins, high level by default, active low level
(connected to test suite LED2)
2
PB4
Input / Output
RF transmission indication pin, default high level, active low level
(connected to test suite LED1)
3
PB5
Input / Output
Not used yet, NC recommended
4
PB6
Input / Output
Not used yet, NC recommended
5
PB7
Input / Output
Not used yet, NC recommended
6
PB8
Input / Output
Not used yet, NC recommended
7
PA0
Input / Output
Default is high level, pull it low when power on to enter the Bootloader
(connected to the test suite KEY button)
8
PA1
Input / Output
Not used yet, NC recommended
9
PA2
Input / Output
UART_TXD, serial port transmit pin
10
PA3
Input / Output
UART_RXD, serial port receiving pin
11
PA4
Input / Output
Not used yet, NC recommended
12
PA5
Input / Output
Not used yet, NC recommended
13
GND
Input / Output
Ground wire, connected to the power reference ground
14
ANT
Input / Output
Antenna interface, 50Ω characteristic impedance (connected to SMA
interface of test kit)
15
GND
Input / Output
Ground wire, connected to the power reference ground
16
PA8
Input / Output
Not used yet, NC recommended
17
NRST
Input
Reset pin, default high level, active low level (connected to test suite RST
button)
18
PA9
Input / Output
Not used yet, NC recommended
19
PA12
Input / Output
Not used yet, NC recommended
20
PA11
Input / Output
Not used yet, NC recommended
21
PA10
Input / Output
Not used yet, NC recommended
22
PB12
Input / Output
Not used yet, NC recommended
23
PB2
Input / Output
Not used yet, NC recommended
24
PB0
Input / Output
Not used yet, NC recommended
25
PA15
Input / Output
Not used yet, NC recommended
26
PC13
Input / Output
Not used yet, NC recommended
27
GND
Input / Output
Ground wire, connected to the power reference ground
28
VDD
Input
Power supply VDD, the maximum input voltage is 3.6V, it is recommended
to supply power through 3.3V LDO
29
SWDIO
-
Debug pin
30
SWCLK
-
Debug pin