AM29114DC

The AM29114DC is a high-performance 8-bit vectored priority interrupt controller intended for use in very high-speed microprogranmmed machines.Its architecture and instruction set are optimized to take full advantage of the real-time interrupt capabilities of state-of-the-art sequencers such as the Am29112

The AM29114DC receives interrupt requests on 8 interrupt input lines.A low level is a request.An internal latch may be used to catch pulses on these lines,or the latch may be bypassed so the request lines drive the edge-triggered interrupt register directly.An 8-bit mask register is used to mask individual interrupts.Requests in the interrupt register are ANDed with the corresponding bits in the mask register and the result is sent to a prioity encoder,which produces a 3-bit encoded vector representing vector will be held in the vector output register.

The AM29114DC is controlled by a 4-bit instruction field which allows the three above-mentioned register to be read or modified under microprogram control.