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3. TECHNICAL BRIEF
MCU Subsystem
The MCU (Micro-Controller Unit) subsystem contains ARM7 microprocessor, internal memory and the
ROM patch function. It also contains the UART interface controller, USB full-speed device controller, serial
flash interface controller and the power/clock management function.
Bluetooth Baseband Subsystem
The Bluetooth baseband subsystem contains a baseband processor which supports the timing control,
the bitstream processing, encryption, frequency hopping, and modulation/demodulation. It also contains
the audio codec, Wi-Fi coexistence interface controller, and a sleep mode controller.
RF Subsystem
MT6612 contains a fully integrated transceiver.
For TX path, the baseband transmit data is digitally modulated in the baseband processor, then up-
converted to 2.4GHz RF channels through DA converter, filter, IQ up-converter, and the power amplifier.
The power amplifier is capable of transmitting 9dBm power for class 1 operation.
For RX path, MT6612 is a low IF receiver architecture. An image-reject mixer down-converts the RF signal
to the IF with the LO from the synthesizer, which could support different clock frequencies as the
reference clock as described in section "Clock Generation". The mixer output is then converted to digital
signal, down-converted to baseband for demodulation. A fast AGC enables the effective discovery of
device within the dynamic range of the receiver.
MT6612 features self calibration schemes to compensate the process and temperature variation to
maintain high performance. Those calibrations are performed automatically right after system boot-up.
LGE Internal Use Only
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Copyright © 2010 LG Electronics. Inc. All right reserved.
3. TECHNICAL BRIEF
Only for training and service purposes
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