General Description
The pRAM-256 is a versatile neural network processor with an on-chip learning unit. It offers the flexibility of a software solution with the speed of hardware. Connections between the pRAM neurons are reconfigurable which allows a network's architecture to be modified at any time. The pRAM-256 can complete one pass of the training process, training all 256 pRAMs, in less than 0.25 ms when operating at the maximum clock speed of 33 MHz. Because of the high number of pRAMs supported by the pRAM-256, a typical neural network can be built using a single pRAM Module. Several pRAM Modules can operate in parallel so that larger networks can be built. The pRAM-256 is fabricated using an advanced sub-micron gate array semi-custom technology from GEC Plessey Semiconductors. The use of a 68 pin PGA package allows a compact neural network to be built into existing and future systems. Interfaces to EISA and VME bus systems have been defined and the current PC-based board is capable of carrying up to 5 pRAM-256 chips
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