IDT72511

PARALLEL BIDIRECTIONAL FIFO 512 x 18 & 1024 x 18 Integrated Device Technology, Inc. IDT72511 IDT72521 FEATURES: Two side-by-side FIFO memory arrays for bidirectional data transfers 512 x 18-Bit - 512 x 18-Bit (IDT72511) 1024 x 18-Bit - 1024 x 18-Bit (IDT72521) 18-bit data buses on Port A side and Port B side Can be configured for 18-to-18-bit or 36-to-36-bit communication Fast 35ns access time Fully programmable standard microprocessor interface Built-in bypass path for direct data transfer between two ports Two fixed flags, Empty and Full, for both the A-to-B and the B-to-A FIFO Two programmable flags, Almost-Empty and Almost-Full for each FIFO Programmable flag offset can be set to any depth in the FIFO Any of the eight flags can be assigned to four external flag pins Flexible reread/rewrite capabilities Six general-purpose programmable I/O pins Standard DMA control pins for data exchange with peripherals 68-pin PGA and PLCC packages DESCRIPTION: The IDT72511 and IDT72521 are highly integrated first-in, first-out memories that enhance processor-to-processor and processor-to-peripheral communications. IDT BiFIFOs integrate two side-by-side memory arrays for data transfers in two directions. The BiFIFOs have two ports, A and B, that both have standard microprocessor interfaces. All BiFIFO operations are controlled from the 18-bit wide Port A. Port B is also 18 bits wide and can be connected to another processor or a peripheral controller. Th...