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< Baseband Circuit description of SGH-D807 >
1. CSP2750 (UCD101)
==> The CSP2750 has two major logical components power management and
conversion signal processing.
The PSC component is responsible for all power-related functionality, including the
following;
● Power management for RF, BB and ancillary devices within the GSM/GPRS
● Battery-charge management
● Reset control
● SIM card voltage-level shifting
The CSP component is responsible for the following ;
● Intraframe event scheduling
● Voice band processing, including voice band ADC and DAC
● Analog baseband processing, including baseband ADC and DAC
● Providing RF interface for Trident digital baseband device
● Transmitter Power control
● Automatic frequency control
● A5 ciphering
● Low-power sleep mode and wake-up control
The CSP2750 has the following major physical components;
● Timing and control unit
● RF serial interface
● Low-power sleep mode controller
● Baseband Transmitter / Receiver
● Voice input and output
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5-3
Circuit Description
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