UPD77P25 Description
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 the SPI+ to execute mon digital filter routines more efficiently and hence at more than twice the speed of a 7720...
UPD77P25 Applications
- necessary for high speed signal processing algorithms. The SPI+ multiplier is very sophisticated especially for a Iow-cost OSP chip
- since both multiplier inputs can be Ioaded simultaneously from two separate memory areas. These Ioading operations are only two of nine operations (see 'Feature