Bt & Fm Module(Mt666, U401) - LG -A290 Service Manual

3.7 BT & FM Module(MT6626, U401)
The connections between internal modules, as well as, external interfaces can be found in Figure 3.7.1
The Bluetooth transceiver section of MT666 incorporates the complete receiving and transmitting Paths, including PLL,
VCO, LNA, PA, modulator, and demodulator. The Bluetooth baseband signal processor incorporates hardware engines to
perform frequency hopping, error correcting, whitening, encrypting, data packet assembling. The FM receiver section
incorporates the complete receiving path with wide tuning range. The FM baseband signal processor incorporates the
digital demodulator and audio processing function which provides superior audio quality as well as RDS/RBDS data
service.
XTAL
CLOCK
GEN.
BLUETOOTH TRANSCEIVER
3.7.1 General Description
MT666 is a monolithic single chip that integrates Bluetooth v.1+EDR and FM receiver. It can be incorporated in varieties
of mobile platforms to provide Bluetooth connectivity and FM radio. MT666 is available in QFN40 and WLCSP package.
With a very small package size and require few external BOM components, a compact footprint can be designed for
today's slim mobile device. Unparalleled performance of sensitivity and interference rejection featured, MT666 also
provides uncompromising low power performance. It also supports 10dBm transmit power with efficient power control,
which provide the user with excellent link quality.
LGE Internal Use Only
CLOCK
VCC28_RF VDD28
ENABLE
SLEEP RF DIG
CON
LDO LDO
FM RECEIVER
32K CLOCK
INTERRUPT
Figure 3.7.1. BT BLOCK DIAGRAM
PCM VBAT
PTA VCC28OUT
PCM
CODEC
BAT LDO
INTERFACE
BRIDGE
BLUETOOTH
BASEBAND SIGNAL
PROCESSOR
INTERRUPT
CONTROLLER
FM BASEBAND
SIGNAL PROCESSOR
I2S
(WLCSP
AUDIO
ONLY)
DAC
RDS I2S
ANALOG
OUTPUT
- 34 - Copyright © 01 LG Electronics. Inc. All right reserved.
3. TECHNICAL BRIEF
DMA
SYSRAM
CONTROL
APB
32-BIT
MICROPROCESS
OR
JTAG
I2C GPIO UART
GPIO/EINT
UART
I2C
Only for training and service purposes
JTAG