MA2901

www.DataSheet4U.com Obsolescence Notice This product is obsolete. This information is available for your convenience only. For more information on Zarlink’s obsolete products and replacement product lists, please visit http://products.zarlink.com/obsolete_products/ FEBRUARY 1995 MA2901 DS3576-3.3 MA2901 RADIATION HARD 4-BIT MICROPROCESSOR SLICE The MA2901 is an industry standard 4-bit microprocessor slice It provides a set of ALU functions selected by microcode data applied to the inputs. The device is cascadable to handle any word length. It can be used as a building block in the construction of microcomputers and controllers tailored to meet specialised applications. Dual Address Architecture Machine cycles are saved by simultaneous, independent access to two working registers. ALU has Eight Functions Operations performed are addition, two subtractions and five logic functions on two source operands. Four State Flags Zero, negative, carry and overflow. Left / Right Shift is Independent of ALU Only one cycle taken for add and shift operations. Expandable Any number of MA2901 units can be connected together to achieve longer word lengths. Micro Programmable Three groups, each of three bits, for ALU function, source operand and destination control. OPERATION A detailed block diagram of the microprogrammable microprocessor structure is shown in figure 1. The circuit is a four-bit slice, cascadable to any number of bits. Therefore, all data paths within the circuit are four...