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3. TECHNICAL BRIEF
3.7.11 Serial Bus Interface(SBI)
The MSM6280 device’s SSBI is designed specifically to be a quick, low pin count control protocol for
QUALCOMM’s RTR6275, RFR6275 and PM6650 ASICs. Using the SSBI, the RTR6275, RFR6275,
and PM6650 devices can be configured for different operating modes and for minimum power
consumption, extending battery life in Standby mode. The SSBI also controls DC baseband offset
errors.
3.7.12 Wideband CODEC
The MSM6280 device integrates a wideband voice/audio CODEC into the mobile station modem
(MSM). The CODEC supports two differential microphone inputs, one differential earphone output, one
single-ended earphone output, and a differential analog auxiliary interface. The CODEC integrates the
microphone and earphone amplifiers into the MSM6280 device, reducing the external component
count to just a few passive components. The microphone (Tx) audio path consists of a two-stage
amplifier with the gain of the second stage set interally. The Rx/Tx paths are designed to meet the
ITU-G.712 requirements for digital transmission systems.
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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