Only For Training And Service Purposes - LG GM200 Service Manual

Digital Baseband Core (VCORE)
The Digital Baseband Core regulator supplies the digital baseband processor (DBB) core.
The voltage on VCORE is selectable using the VCORE Control register.
The VCORE Active code selects the voltage on VCORE in high power mode and the
VCORE Standby code selects the voltage on VCORE in low-power mode.
DBB Interface (VINT)
The DBB interface regulator supplies the DBB/ABB digital interfaces. The output voltage of the VINT regulator
is nominal 1.8V.
Memory (VMEM)
The VMEM regulator supplies the external memory(s) and the interface to the external memory on the digital
baseband processor. The output voltage of the Memory Interface regulator can be selected as 1.8V nominal
or 2.8V nominal using the VMEMSEL terminal.
External Interface (VEXT)
The External Interface regulator supplies the Radio digital interface and the high voltage (>1.8V) interface
between the digital baseband processor and various peripherals, such as the LED indicators and the LCD
display.
SIM Interface (VSIM)
AD6725-ATLAS3HLITE is designed to support 3.0 V and 1.8 V SIMs exclusively (i.e. no 5 V SIMs).
The SIM Interface regulator supplies the SIM interface circuitry on the digital processor and the SIM card. By
default the SIM Interface regulator output is 2.85 V, which can be decreased to 1.8 V if a 1.8 V SIM is detected.
Real-Time Clock (VRTC)
The Real-Time Clock regulator supplies the Real-Time Clock module. The Real-Time Clock regulator is
optimized for low ground current.
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Copyright © 2009 LG Electronics. Inc. All right reserved.

Only for training and service purposes

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3. TECHNICAL BRIEF
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