RF-Star RF-BM-BG22A1, User Manual, Page: 11 / 23

RF-BM-BG22Ax
www.szrfstar.com V1.0 - Apr., 2021
Shenzhen RF-star Technology Co., Ltd.
Page 11 of 23
B4 GND A4 PA00
B5 BG22Ax CTS pin (PA03) A5 RESET (RF-BT02)
B6 GND A6 Module RTS pin (PA04)
B7 GND A7 Module TX pin (PA05)
B8 GND A8 Module RX pin (PA06)
B9 GND A9 GND
B10 GND A10 Connection status indicator of slave role (PD01)
B11 GND A11 Connection status indicator of master role (PD00)
B12 GND A12 PC00
B13 GND A13 PC01
B14 GND A14 PC02
B15 GND A15 PC03
B16 RXD (CP2102) A16 PC04
B17 TXD (CP2102) A17 PC05
B18 GND A18 GND
B19 GND
B20 VCC (5 V)
B21 VCC (3.3 V)
B22 RXD (CP2102)
B23 TXD (CP2102)
B24 RST
B25 SWD (J-Link)
B26 SWC (J-Link)
B27 VCC (3.3 V)
B28 GND
Remark: B5 is the GPIO PA03 of the module, and A5 is the RESET pin of the RF-BT02.
3.1.2 Pin Wiring
Prepare RF-BT02, RF-BM-BG22Ax, and USB to Type-C cable.
When using the BG22Ax series modules, the following pins need to be connected by Dupont wires: A7 and B22/B16
(TX
→
RXD), A8 and B23/B17 (RX
→
TXD). Remove the 0 R resistance in the red box at first.
When do the test, pls connect CTS to GND.