User's Manual

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www.rovingnetworks.com Version 3.3r 10/3/2012 5
RN-41-DS
Pin Name Description Default
15 UART_RTS UART RTS, goes high to disable host transmitter Low level output from RN-41
16 UART_CTS UART CTS, if set high, it disables transmitter Low level input to RN-41
17 USB_D+ USB port 1.5 K pullup activated when USB
port is ready (~500 ms after reset)
18 USB_D- USB port –
19 GPIO2 Status, high when connected, low otherwise Output from RN-41
20 GPIO3 Auto discovery = high Input to RN-41 with weak pulldown
21 GPIO5 Status, toggles based on state, low on connect Output from RN-41
22 GPIO4 Set factory defaults Input to RN-41 with weak pulldown
23 SPI_CSB Programming only No connect
24 SPI_MISO Programming only No connect
25 - 27 NC RF pad, keep all traces and planes clear –
28 - 29 GND Ground –
30 AIO0 Optional analog input Not used
31 GPIO8 Status (RF data RX/TX) Output from RN-41
32 GPIO9 I/O Input to RN-41 with weak pulldown
33 GPIO10 I/O (remote DTR signal) Input to RN-41 with weak pulldown
34 GPIO11 I/O (remote RTS signal) Input to RN-41 with weak pulldown
35 AIO1 Optional analog input Not Used
Figure 3 shows the module’s physical dimensions.
Figure 3. RN-41/RN-41-N Physical Dimensions