Datasheet

RN-41-SM/RN-42-SM Data Sheet
www.rovingnetworks.com 7/12/2010
809 University Avenue • Los Gatos, CA 95032 • Tel [phone] • [e-mail]
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13 VB1 Analog battery monitor signal No Connect
14 PIO8 Status (RF data rx/tx) Output
15 PIO9 IO Input with weak pulldown
16 PIO10 IO (remote DTR signal) Input with weak pulldown
17 PIO11 IO (remote RTS signal ) Input with weak pulldown
18 RXDB UART receive Input
19 TXDB UART transmit Output
20 RTSB UART RTS, goes HIGH to disable host transmitter Output
21 CTSB UART CTS, if set HIGH, disables TX transmitter input
22 PIO2 Status, HIGH when connected, LOW otherwise Output from RN41
23 PIO3 Auto discovery = HIGH Input t with weak pulldown
24 PIO4 Set factory defaults Input with weak pulldown
Note: When connecting to the RS232 signals on header A: You must connect pin 10 (PRS) to pin 11
(VCC). This powers the RS232 chip. Also make sure that R6 and R8 are installed (default condition).
Header B
1 RX Receive UART Input to module
2
TX
Transmit UART Output from module
3 RTS RTS UART, goes HIGH to disable host transmitter
4 CTS CTS UART, if set HIGH, disables transmitter Tie to RTS if NOT driven
5 VDD 5-16 VDC
6 GND Ground
Note: To use Header B you must remove resistors R6 and R8. Removing these resistors disconnects
the RX (header A pin 4) and CTS (header A pin 7) signals from the RS232 chip.
R6
R8