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PDF ( 数据手册 , 数据表 ) RN-42

零件编号 RN-42
描述 Class 2 Bluetooth Module
制造商 Roving Networks
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RN-42 数据手册, 描述, 功能
www.rovingnetworks.com
RN-42/RN-42-N Data Sheet
DS-RN42-V1.0 12/6/2010
Class 2 Bluetooth® Module
Features
Fully qualified Bluetooth 2.1/2.0/1.2/1.1
module
Bluetooth v2.0+EDR support
Available with on board chip antenna (RN-
42) and without antenna (RN-42-N)
Postage stamp sized form factor, 13.4mm x
25.8 mm x 2mm (RN-42) and 13.4mm x 20
mm x 2 mm (RN-42-N)
Low power (26uA sleep, 3mA connected,
30mA transmit)
UART (SPP or HCI) and USB (HCI only)
data connection interfaces.
Sustained SPP data rates - 240Kbps (slave),
300Kbps (master)
HCI data rates - 1.5Mbps sustained, 3.0Mbps
burst in HCI mode
Embedded Bluetooth stack profiles included
(requires no host stack): GAP, SDP,
RFCOMM and L2CAP protocols, with SPP
and DUN profile support.
Bluetooth SIG certified
Castellated SMT pads for easy and reliable
PCB mounting
Certifications: FCC, ICS, CE
Environmentally friendly, RoHS compliant
Applications
Cable replacement
Barcode scanners
Measurement and monitoring systems
Industrial sensors and controls
Medical devices
Barcode readers
Computer accessories
Description
The RN42 is a small form factor, low power, highly
economic Bluetooth radio for OEM’s adding wireless
capability to their products. The RN42 supports
multiple interface protocols, is simple to design in and
fully certified, making it a complete embedded
Bluetooth solution. The RN 42 is functionally
compatible with RN 41. With its high performance on
chip antenna and support for Bluetooth® Enhanced
Data Rate (EDR), the RN42 delivers up to 3 Mbps
data rate for distances to 20M. The RN-42 also
comes in a package with no antenna (RN-42-N).
Useful when the application requires an external
antenna, the RN-42-N is shorter in length and has RF
pads to route the antenna signal.
Block Diagram
Crystal
RF
Switch
PA BALUN
CSR BlueCore-04
External
VCC
GND
PIO4
PIO5
PIO6
USB
UART
PCM
Flash
Memory
809 University Avenue Los Gatos, CA 95032 Tel (408) 395-6539 [email protected]
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RN-42 pdf, 数据表
www.rovingnetworks.com
RN-42/RN-42-N Data Sheet
DS-RN42-V3.1 12/6/2010
Design Concerns
1.Reset circuit. RN-42 contains a weak pullup to VCC, the polarity of reset on the RN42 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. Often
a microcontroller or embedded CPU IO is available to generate reset once power is stable. If not, there
are many low cost power supervisor chips available, such as MCP809, MCP102/121, and Torex XC61F.
2.Factory reset PIO4. It is a good idea to connect this pin to a switch, or jumper, or resistor, so it can be
accessed. This pin 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 start HIGH, then toggle two
times.
3.Connection status. PIO5 is available to drive an LED, and blinks at various speeds to indicate status.
PIO2 is an output which directly reflects the connection state, it goes HIGH when connected, and LOW
otherwise.
4.HCI mode. The RN42 module must be loaded with special firmware to run in HCI mode. When in HCI
mode the standard SPP/DUN applications are disabled.
5.Using SPI bus for flash upgrade. While not required, this bus is very useful for configuring advanced
parameters of the Bluetooth modules, and is required for upgrading the firmware on modules. The
suggested ref-design shows a 6pin header which can be implemented to gain access to this bus. A
minimum-mode version could just use the SPI signals (4pins) and pickup ground and VCC from elsewhere
on the design.
6.Minimizing Radio interference. When laying out the carrier board for the RN42 module the areas under
the antenna and shielding connections should not have surface traces, GND planes, or exposed vias.
(See diagram to right) For optimal radio performance the antenna end of RN42 module should protrude
5mm past any metal enclosure.
1.5 mm
13.2 mm
1.5 mm
7.0 mm
ATTE NTION:
Do not locate any
par ts, sur face
tr aces, inter nal
tr aces or GND
plane under the
antenna ar ea
1.5 mm
1
2
3
4
5
6
7
8
9
10
11
12
ATTE NTION:
Do not locate
vias or sur face
tr aces under
shield
connector s
1.5m m squar e
35 34 32 28
29 33 31 30
1.5 mm
24
23
22
21
20
19
18
17
16
15
14
13
2.0 mm
25.8 mm
809 University Avenue Los Gatos, CA 95032 Tel (408) 395-6539 [email protected]
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