LG Electronics USA RBFS-B921A Bluetooth Module User Manual Manual

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Document ID	1216146
Application ID	5BDdrXMZH5hQmB6h5KcKDw==
Document Description	Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	53.57kB (669587 bits)
Date Submitted	2009-12-18 00:00:00
Date Available	2010-06-15 00:00:00
Creation Date	2009-11-23 18:39:09
Producing Software	Acrobat Distiller 7.0.5 (Windows)
Document Lastmod	2009-12-08 14:10:09
Document Title	Microsoft PowerPoint - RBFS-B921A Description of Functional Blocks.ppt [호환 모드]
Document Creator	PScript5.dll Version 5.2.2
Document Author:	jhahn

Description
of Functional Blocks
RBFS--B921A BT Ass’y Module
RBFS
Rev A, Nov 2009
LG Innotek
Hanyang Univ. 1271, Sa-dong, Sangrok-gu ,
Ansan-si, Gyeonggi-do 426-791, Korea
Tel:82-31-436-7653
Fax:82 31 436 7991
Fax:82-31-436-7991
www.lginnotek.com
RBFS-B921A-AN-01-A
COMMERCIAL IN CONFIDENCE
Copyright ⓒ 2007, LG Innotek Co., Ltd. http:\\www.lginnotek.com
All specification are preliminary and LG Innotek reserves the right to change these without notice.
„ RBFS
BFS--B921A
1. RF Receiver Block
1.1 Receiver Path
The receiver path uses a low IF scheme to down-convert the received bit signal for
demodulation in the digital demodulator and bit synchronizer. The receiver path
provides a high degree of linearity, an extended dynamic range, and high order onchip channel filtering to ensure reliable operation in the noisy 2.4 GHz ISM band. The
front-end
front
end topology, with built-in
built in out-of-band
out of band attenuation, enables the device to be used
in most applications with no off-chip filtering. For integrated handset operation where
the Bluetooth function is integrated close to the cellular transmitter, minimal external
filtering is required to eliminate the desensitization of the receiver by the cellular
transmit signal.
1.1.1 Digital Demodulator and Bit synchronizer
The digital
demodulator and bit synchronizer
takes the low IF received signal
and
performs an optimal frequency tracking and bit synchronization algorithm.
1.1.2 Receiver Signal Strength Indicator
The BCM2046 radio provides an Receiver Signal Strength (RSSI) signal to the
baseband so that the controller can take part in a Bluetooth power-controlled link by
providing a metric of its own receiver signal strength to determine whether the
transmitter should increase or decrease its output power.
RBFS-B921A-AN-01-A
Page 1
„ RBFS
BFS--B921A
2. RF Transmitter Block
2.1 Transmitter Path
The BCM2046 features a fully integrated zero IF transmitter. The baseband transmit
data is digitally GFSK modulated in the modem block and up-converted to the 2.4 GHz
ISM band in the transmitter path. The transmitter path consists of signal filtering, I/Q
up-conversion, high-output power amplifier (PA), and RF filtering. It also incorporates
p and 8-DPSK for 3 Mbps
p to support
pp
new modulation schemes P/4-DQPSK for 2 Mbps
enhanced data rate.
2.1.1 Digital Modulator
The digital modulator performs the data modulation and filtering required for the GFSK,
π/4DQPSK, and 8-DPSK signal. The fully digital modulator minimizes any frequency
drift or anomalies in the modulation characteristics of the transmitted signal and is
much more stable than direct VCO modulation schemes.
2.1.2 Digital Demodulator and Bit Synchronizer
The digital demodulator and bit synchronizer takes the low IF received signal and
performs an optimal frequency tracking and bit synchronization algorithm.
2.1.3 Power Amplifier
The integrated PA for the BCM2046 can transmit at a maximum power of +4dBm for
class2 operation. The transmit power levels are for basic rate and EDR. Due to the
linear nature of the PA, combined with some integrated filtering, no external filters are
required for meeting Bluetooth and regulatory harmonic and spurious requirements.
For integrated mobile handset applications, where Bluetooth is integrated next to the
cellular radio, minimal external filtering can be applied to achieve near thermal noise
levels for spurious and radiated noise emissions.
RBFS-B921A-AN-01-A
Page 2
„ RBFS
BFS--B921A
3. Bluetooth Baseband Core
The Bl
Th
Bluetooth
t th Baseband
b d Core
(BBC) implements
i l
t allll off the
th time
ti
critical
iti l ffunctions
ti
required
i d ffor
high performance Bluetooth operation. The BBC manages the buffering, segmentation, and
routing of data for all connections. It also buffers data that passes through it, handles data
flow control, schedules SCO/ACL TX/RX transactions, monitors Bluetooth slot usage,
optimally segments and packages data into baseband packets, manages connection status
indicators, and composes and decodes HCI packets. In addition to these functions, it
independently handles HCI event types, and HCI command types.
4. Microprocessor Unit
The BCM2046 microprocessor unit(μPU) runs software from link control(LC) layer, up to the
host controller interface(HCI). The microprocessor is based on ARM7TDMIS 32-bit RISC
processor with
ith embedded
b dd d ICE
ICE-RT
RT d
debug
b and
d JTAG iinterface
t f
units.
it Th
The μPU
PU also
l consists
i t off
256KB of ROM memory for program storage and boot ROM, 48KB of RAM for data
scratchpad and patch RAM code.
5. EEPROM Interface
The BCM2046 provides the Broadcom Serial Control(BSC) master interface; the BSC is
programmed by the CPU to generate four different types of BSC transfers on the bus: readonly, write-only, combined read/write, and combined write-read. BSC supports both low-speed
and fast mode devices. The BSC is compatible with I2C slave devices, except that multiple
I2C masters are not supported, and flexible wait state insertion by either the master interface
or slave devices are not supported. The EEPROM may contain configuration information
concerning the ccustomer
stomer application
application, incl
including
ding the follo
following:
ing Fractional
Fractional-N
N information
information,
BD_ADDR, baud rate, USB enumeration information, SDP service record, and file system
information used for code, code patches, or data. Bluetooth Module(RBFS-B921A) included
128Kbit EEPROM unit.
RBFS-B921A-AN-01-A
Page 3
„ RBFS
BFS--B921A
6. USB Interface
The USB device
Th
d i descriptor,
i t configuration
fi
ti d
descriptor,
i t and
d string
ti d
descriptor
i t are ffully
ll
programmable if the default settings are not desired. This allows the end manufacturer
to customize the descriptors that the BCM2046 uses to identify itself on the USB port,
including the Vendor ID and Product ID. The custom USB descriptor information may
be stored in external EEPROM so that it is available at boot time.
7. Crystal Interface and Clock Generation
The BCM2046 uses a fractional-N synthesizer to generate the radio frequencies, clock,
and data packet timing. This enables it to operate from any of a multitude of frequency
sources. This may either be an external source such as a TCXO or crystal interfaced
directly to the device. The default frequency reference setting is a 26-MHz crystal or
TCXO Bluetooth
TCXO.
Bl t th Module(RBFS-B921A)
M d l (RBFS B921A) iincluded
l d d crystal
t l unit.
it
RBFS-B921A-AN-01-A
Page 4
„ RBFS
BFS--B921A
RECORD OF CHANGES
Revision No.
Date
Description
Nov. 2009
Initial Release
RBFS-B921A-AN-01-A
Page 5
„ RBFS
BFS--B921A
Contact for Support
Name : inpyo Park
E-mail : ippark@lginnotek.com
Tel : 82-31-436-7653
Fax : 82-31-436-7991
RBFS-B921A-AN-01-A
Page 6
■ RBFS-B921A
FCC compliance Information
This device complies with part 15 of FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference received.
2. This device must accept any interference received. Including interference that may cause undesired operation.
FCC WARNING
This equipment may generate or use radio frequency energy. Changes or modifications to this equipment may
cause harmful interference unless the modifications are expressly approved in the instruction manual. The user
could lose the authority to operate this equipment if an unauthorized change or modification is made.
To satisfy FCC exterior labeling requirements, the following text must be placed on the exterior Of the end
product.
Contains Transmitter Module FCC ID: BEJRBFS-B921A
CAUTION: This device and it’s antenna(s) must not be co-located or operated in conjunction with any other
antenna or transmitter. End users cannot modify this transmitter device. Any Unauthorized modification could void
the user’s authority to operate this device.
RBFS-B921A-AN-01-A
Page 7

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Title                           : Microsoft PowerPoint - RBFS-B921A Description of Functional Blocks.ppt [호환 모드]
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