The AD6526 is the second device, after the AD6522, of the Analog Devices AD20msp430 series of SoftFone GSM Baseband Processors. The AD6526 provides a competitive solution for GSM/GPRS terminal designs. It is designed to be fully integrated, easy to use, and compatible with GSM900, DCS1800 and PCS1900 handsets as well as direct PC data interface. No external SRAM is needed in most applications. The AD6526 integrates full rate, enhanced full rate and half rate speech codecs as well as a full range of data services including circuit-switched 14.4 kb/s, GPRS to Class 12, and HSCSD. In addition, it supports both A5/1 and A5/2 encryption algorithms as well as operation in non-encrypted mode. The highly programmable architecture and sophisticated internal communication channels of the AD6526 offer maximum flexibility to system designers. It can adapt to tighter requirements led by changes in standards and end-market feature set requirements.