SC14408 Datasheet | National Semiconductor

Description The SC14408 is a CMOS chip optimized to handle all the audio, signal and data processing needed within a DECT (1.9GHz) or in the 2.4GHz ISM digital band handset. An ADPCM transcoder, a very low power CODEC and Analog Frontend is integrated. Direct connections towards microphone and a (dynamical) loudspeaker are provided. Duplex quality handsfree operation is integrated. The SC14408 is designed to fit to any radio design. A dedicated TDMA controller handles all physical layer slot formats and radio control. National Semiconductors standard pact RISCTM CR16B 16 bit microcontroller takes care of all the higher protocol stack. I Embedded 16 bit pact RISCTM Micro Controller. (CR16B) with programmable clock speeds. I 384 kbyte Flash. I ACCESSBUSTM or MICROWIRETM interfaces I 6 kilobyte on-chip Data Memory. I One full duplex ADPCM transcoder. I On-chip 14-bit linear CODEC. I 14 upto 44 d B gain differential microphone input buffer. I 80 Ω loudspeaker driver. I Software controlled gain on audio input and output. I Peak hold ADC for RSSI measurement. I Five general purpose inputs can be multiplexed on an 8 bit ADC with selectable ranges. I On-chip dedicated TDMA instruction co-processor which supports DECT and ISM-bands providing 1.152 Mb/s, 1.024 Mb/s, 0.576 Mb/s, 0.512 Mb/s, 0.288 Mb/s and 0.256 Mb/s. I Seven programmable control signals for radio front end. I Full and double slot, protected and unprotected Bfields. I Duplex quality handsfree operation. I Tone generator. Tones consisting of 3 frequencies can be programmed I Linear PCM interface for external codec. I ISM band support with 8/9 x 10.368 Mc xtal = 9.216 Mc I On chip LCD controller (6X30 segments) Note: ACCESSBUSTM, MICROWIRETM and pact RISCTM are trademarks of National Semiconductor Corporation. Features I Integrated DECT Baseband transceiver optimized for GAP handsets according to ETS 300 175-2, 175-3 & 175-8. I Two on board low drop voltage regulators with 2.5V and 3.0- 3.8V (with external...