PDSP16540

Obsolescence Notice This product is obsolete. This information is available for your convenience only. www.DataSheet4U.com For more information on Zarlink’s obsolete products and replacement product lists, please visit http://products.zarlink.com/obsolete_products/ THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS PDSP16540 FEBRUARY 1995 ADVANCE INFORMATION DS3715 - 2.1 PDSP16540 32K BUCKET BUFFER (Supersedes version in December 1993 Digital Video & Digital Signal Processing IC Handbook, HB3923-1) The PDSP16540 Bucket Buffer is for use in systems which require a reservoir in which a block of data is accumulated, whilst previous data is being transferred to other system elements and then processed. It thus prevents the loss of incoming data whilst the previous block is being processed. Like a FIFO all address are generated internally. It differs from a normal FIFO, however, by allowing the user to define both the length of the data block and also the amount of the old data to be re-read before the new data is added. The latter feature supports the block overlapping requirements of Digital Signal Processing Systems performing Fast Fourier Transforms. It also provides wide, 32 bit, input and output buses, unlike normal byte wide FIFO's. This wide configuration supports the16 bit real and imaginary components of the complex data found in many DSP systems. In particular, the device can be directly connected to the PDSP16510 FFT Processor wi...