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