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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Design Concerns
1. Reset circuit. RN-41-SM / RN-42-SM contains a 1k pullup to VCC, the polarity of reset on the RN-41 / RN-42 is
ACTIVE LOW. A power on reset circuit with delay is OPTIONAL on the reset pin of the module. It should only be
required if the input power supply has a very slow ramp, or tends to bounce or have instability on power up. Use
microcontroller GPIO to control reset once power is stable. Also can be driven from low cost power supervisor
chips available, such as MCP809, MCP102/121, and Torex XC61F.
2. Factory reset PIO4. Connect this pin to a switch, or jumper, or resistor for access. Can be used to reset the
module to FACTORY DEFAULTS and is often critical in situations where the module has been mis-configured. To
set Factory defaults: set pin HIGH, apply power, then toggle 4 times.
3. Connection status. PIO2 is an output which directly reflects the connection state, it goes HIGH when
connected, and LOW otherwise.
4. HCI mode. The RN41-SM module must be loaded with special firmware to run in HCI mode. When in HCI mode
the standard SPP/DUN applications are disabled.
5. Shutdown mode. Pin 9 Shutdown has a pullup to 3.3V. If you pull this pin LOW it shuts down the on board
regulator putting the module in micropower mode. Shutdown also turns off the power to the RS-232 chip so you
can hook the module to a battery and a remote microcontroller like a PIC you can go super low power, wake up
connect send data go to sleep.
6. Minimizing Radio interference The areas under the antenna should not have surface traces, GND planes, or
exposed vias,or metal enclosures for optimal radio performance the antenna
Compliance Information
Category Country Standard
Radio USA
FCC CFR47 Part 15 C, para 15.247
FCC ID:
T9J-R41-1
EUROPE
EN 300 328-1
EN 300 328-2 2.4GHz
CANADA
IC RSS-210 low power comm. device
IC Canada ID:
6514A-RN411
EMC USA
FCC CFR47 Part 15 subclass B
EUROPE
EN 55022 Class B radiated
EN61000-4-2 ESD immunity
EN61000-4-3 radiated field
EN61000-4-6 RF immunity
EN61000-4-8 power magnetic immunity
Bluetooth LISTED
B013180
Environmental RoHS
RoHS compliant