Sony Ericsson C702 Troubleshooting Manual page 86

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FUNCTIONAL OVERVIEW

Technical Description

SEMC Troubleshooting Manual

C702

Baseband Part

Functional Blocks of the Analog Baseband Controller:

Analog Baseband Controller

Power Management

N2000 (Vera)

This component is not replaceable on SL 4 because Baseband calibration is required.

The analog baseband controller is a mixed digital and analog device

that supports the following circuitry:

• Power management circuitry

• Voltage regulation circuitry

• Eight Low Dropout (LDO) regulators and low power regulator

• 600 mA integrated Buck regulator

• Boost step-up DC/DC converter for White Light Emitting Diode (WLED) driving

• Battery charging and communication circuitry

• Battery fuel gauging circuitry

• Analog-to-Digital Converter (ADC)

• SIM interface

• Six programmable LED drivers

• Accurate band gap reference

• Vibrator driver

• Real Time Clock (RTC)

• Eight-byte One-Time Programmable (OTP) memory

• Pulse Code Modulation (PCM) voice coder/decoder

• PCM audio coder/decoder

• Microphone interface

• Stereo line input

• Earphone driver

• Earpiece driver

• 8-Ω speaker driver / Stereo line output

The analog baseband controller is controlled by an I2C™ interface. It also comprises

the main power management circuits, equipped with a number of converters and

regulators for generating the required supply voltages.

1221-7857 rev. 1

(115)

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Troubleshooting