Product Specs

15
CS
I/O
P21 or I2C1 TMS, or JTAG TMS or QSPI IO2 Flash download
chip enable signal at download mode
16
SCK
I/O
p20 or I2C1 SCL, or JTAG TCK or QSPI IO3 Flash download
port clock signal at download mode
17
U2_RXA
I/O
P1 port or UART2 RXD or I2C2 SDA, through
Commonly used for user UART receiving, rf calibration test
command control
18
U2_TXA
I/O
P0 or UART2 TXD or I2C2 SCL, through
Commonly used for user UART transmission, rf calibration test
command control
19
REST
I
Chip enable, active high
20
P7/PWM1
I/O
P7 or Wi-Fi active output or PWM 1
21
P8/PWM2
I/O
P8 or Bluetooth active input or PWM 2
22
P9/PWM3
I/O
P9 or Bluetooth priority input or PWM 3
23
U1_RX
I/O
P10/UART1_RXD is usually used for debugging UART receiving
24
U1_TX
I/O
P11/UART1_TXD is usually used for debugging UART sending
25
GND
GND
GND
九、Matters need attention：
A.As for the use environment of WIFI, wireless signals are easily affected by the surrounding
environment. For example, obstacles such as trees and metals will absorb wireless signals to
some extent, so that the distance of data transmission is affected to some extent in practical
applications.
B.It is recommended that the metal enclosure be not installed in the metal enclosure as it is
shielded from radio frequency signals.
C.PCB board: as the metal will weaken the function of the antenna, when distributing the
board to the module, it is strictly prohibited to lay the floor and wire under the module
antenna. It is better if it can be hollowed out.
10.Recommended reflux temperature: