ad6422 Analog Devices, Inc., ad6422 Datasheet
ad6422
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ad6422 Summary of contents
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... EEPROM KEYPAD CHIPSET COMPONENTS GSM Processor (GSMP) The AD6422 combines application specific hardware, an em- bedded 16-bit DSP and an embedded 16-bit microcontroller (Hitachi H8/300H). It performs channel coding and decoding and executes the protocol stack and user software. The DSP 2 implements full rate speech transcoding according to GSM specifications, including Discontinuous Transmission (DTX) and Comfort Noise Insertion (CNI) ...
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... Partnership can provide licenses to software and reference de- signs in all areas of a GSM handportable terminal. For detailed information about the individual chipset compo- nents, please refer to the AD6421 (VBC) and AD6422 (GSMP) data sheets for electrical characteristics and timing information. FUNCTIONAL DESCRIPTION Figure functional block diagram of the GSM baseband processing chipset ...
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... The GSMP and the respective parts of the Layer 1 software control the overall timing and frequency generation of the radio subsystem. This includes control signals for two synthesizers, power-down control signals and power amplifier monitor sig- nals. Detailed information can be found in the AD6422 data sheet. Tx DAC GSMSK ...
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AD20msp415 Generation of Auxiliary Audio Signals Under control of Layer 1, the GSMP can generate a variety of fixed and user-programmable tones. This includes all standard DTMF and Call Progress tones as well as user defined tones. The tone structure ...
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... Analog Devices upon request. Digital Interface to GSMP for Data Services The chipset uses a serial interface that is connected to an exter- nal data terminal adapter as described in the AD6422 data sheet. Digital Interface from the GSMP to the EEPROM The GSMP provides separate pins to interface directly to an external serial EEPROM via a serial bus ...
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... AD6422 provides Test/Mode pins, which select differ- ent test and operating modes. Digital Interface from GSMP to Optional EFR-Coprocessor The AD6422 provides a digital interface to an external EFR Coprocessor (DSP). This coprocessor is required to handle the Enhanced Full Rate speech codec in PCS1900 mobile radios. ...
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... PCMCIA applications. EFR* Unit An Evaluation and Development system may be ordered for this chipset, under the part number, NRE20msp415EB1. TQFP –7– AD20msp415 ORDERING GUIDE Part Number Supply Voltage Range AD6421AST +2 +3.3 V AD6422AST +2 +3.3 V AD6423 +2 +3.3 V ...
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