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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Pin Description
NOTE: The RN-41 and the RN-42 are pin and functionally compatible.
Signals on Header A except pins 4, 5, 6 and 7 have the following logic levels.
Input logic level LOW is from -0.4 v to 0.8 V, input high is from 2.1 to 3.4V.
Output logic level LOW max is 0.2 and output HIGH is minimum is 2.8.
All I/O’s except reset default to weak pull down.
Header A
Pin
Name
Description
Default State
1 PIO6 Set BT master (HIGH=auto-master mode) Input with weak pulldown
2 PIO7 Set Baud rate (HIGH = force 9600, LOW = 115K or firmware
setting)
Input with weak pulldown
3 RESET Active LOW reset Input to RN41 with 1K pullup
4 RX RS232 receive input (see note below)
5 TX RS232 transmit output (see note below)
6 RTS RS232 RTS (see note below)
7 CTS RS232 CTS (see note below)
8 VB2 Analog battery monitor signal (Not currently supported in
firmware)
No Connect
9 SHUT
DOWN
Shuts down power to the entire module. Active LOW
10 PRS RS232 power
Short to pin 11 VCC to enable RS232
11 VCC 3.3 3.3V regulated power input
12 GND Ground
Header A
1
2
3
4
5
6
7
8
9
10
11
12
Header A
24
23
22
21
20
19
18
17
16
15
14
13
1 2 3 4 5 6
Header B
3/5V TTL signaling
5-16 VDC power
RN-41-SM/
RN-42-SM
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