SAA2521

INTEGRATED CIRCUITS DATA SHEET SAA2521 Masking threshold processor for MPEG layer 1 audio compression applications Preliminary specification File under Integrated Circuits, IC01 August 1993 Philips Semiconductors Preliminary specification Masking threshold processor for MPEG layer 1 audio compression applications FEATURES Stereo or 2-channel mono encoding Status may be read continuously Microcontroller interface I2S-interfaces Allocation algorithm including optional emphasis correction (for 44.1 kHz) Reduced power consumption 4 V nominal operating voltage capability. ORDERING INFORMATION EXTENDED TYPE NUMBER SAA2521GP Note 1. SOT205-1; 1996 August 23. PACKAGE PINS 44 PIN POSITION QFP MATERIAL plastic GENERAL DESCRIPTION SAA2521 The SAA2521 performs the adaptive allocation and scaling function for calculating the masking thresholds and sub-band sample accuracy in MPEG layer 1 applications. The SAA2521 is intended for use in conjunction with the stereo filter codec SAA2520. CODE SOT205AG(1) August 1993 2 Philips Semiconductors Preliminary specification Masking threshold processor for MPEG layer 1 audio compression applications SAA2521 VDD handbook, full pagewidth SWS FS256 31 39 14,24,40 33 FDAF 34 INTERFACE COMPENSATION DELAY INTERFACE 32 FDAC SCL NODONE RESOL0 RESOL1 FDIR FRESET FSYNC SCALE TEST3 TEST4 20 21 22 37 36 35 38 15 16 CONTROL SAA2521 ALLOCATION AND SCALING CALCULATION LTDATA LTCNT1 LTCNT0 LTENA LTCLK CLK24 RESET PWRDWN 5 1 2 3 4 ...