CX20524 Overview
The CX20524 Mixed Signal Device (MSD) is a highly integrated device designed for use in multi-band Global System for Mobile munications (GSM) and General Packet Radio Service (GPRS) handsets. The MSD includes all the power management, voice-band, mixed signal, and radio control functions required in a GSM/GPRS handset and module.
CX20524 Key Features
- Supports multi-slot GPRS up to Class 12
- Receive path PGA for AGC of received signal the Baseband Processor (BP) via the Rx serial interface. The
- Digital-to-Analog Converters (DACs) for analog conversion of Automatic Gain Control (AGC) of the receive signal. the GMS
- Transmit power ramping and power level control In the transmit path, bursts of digital data are input to the MSD
- Low noise voiceband ADC for direct interface to handset and over the control port. A Gaussian Minimum-Shift Keying heads
- Low noise voiceband DAC for direct interface to handset and from the input data. The I and Q waveforms are converted int
- Auxiliary 8-bit ADC for monitoring system signals The CX20524 generates an analog signal to control the
- 3 V/1.8 V SIM card interface handset Power Amplifier (PA) output level
- Temperature sensor The device voiceband Codec section provides an interface to a
- High speed asynchronous serial ports for interface to 32 Ω handset speaker and microphone. Line In/Out signals are Skywo