RF-WM-3220B1
Shenzhen RF-star Technology Co., Ltd.
Page 26 of 37
4.4 Module Operation
4.4.1 SOP Configuration
Figure 10. Reference Schematic Diagram of RF-WM-3220B1
Remark:
1)
When Pin 1 & 2 of J15 are short connected, and J16 and J17 are disconnected, the module is in flash
programming mode. Under this mode, the firmware can be burned into Flash via UART0_TX and UART0_RX.
2)
When J15, J16 and J17 are disconnected, the module is in the functional mode + 4 Wire JTAG mode.
3)
When Pin 1 & 2 of J17 are shorted connected, and J15 and J16 are disconnected, the module is in Functional
mode + 2 Wire JTAG mode.
4.4.2 Module Operation
4.4.2.1 Pin Application Sample
Configure by TI online PinMux tool (https://dev.ti.com/).
When one serial port and two IO ports are needed to be used, pin function table will use for reference to choose the
related pins. For example, GPIO3 can work as UART1_TX, GPIO4 as UART1_RX, GPIO2 as normal output port and
GPIO5 as normal input port.
