UPD77P25, UPD77C25 Datasheet (NEC Electronics)

UPD77P25, UPD77C25, Digital Signal Processor

The uP077C25/uP077P25 signal processing interface (SPI) chips are significant upgrades to the uP07720 - the original member of NEC's family of digital signal processors.

Oesignated the "SPI PLUS" (SPI+), these chips execute instructions twice as fast as the 7720/77C20.

Additional instructions allow

NEC Electronics Inc.

ADVANCE PRODUCT INFORMATION NEC August 1987 fJ,PD77C25/ fJ,PD77P25 Digital Signal Processor Data Sheet lhe information contained in this document is being issued in advance of lhe production cycle for the device.

lhe parameters for the device may change bafore final production ar NEC Electronics Inc., aI ils own discretion.

may withdraw lhe device prior to production.

lhe informatian in this document ;5 subject to change without notice.

NEC Electron ics Inc.

assumes no

UPD77P25 Features

* ) that can occur during one 122 ns instruction cycle. (On competitive OSP chips such operations raquire separata instructions). For a typical DSP filter application involving many successive multiplications, the SPI+ provides a new multiplication product for addition to a sum of products every 122 n