New product applications: Microprogrammed bipolar microcomputers are assembled from integrated circuit blocks

The 3000 series of bipolar large-scale integrated (LSI) circuit blocks is designed to meet the needs of data control and communication systems for highspeed programmable logic. A Central Processing Element (CPE) and Microprogram Control Unit (MCU) are the key blocks. The MCU selects microinstructions from a high-speed microprogram memory in the order required to execute higher-level instructions. It contains all the logic for such selections, as well as several other functions that support CPE operations. One MCU is normally required per system, but any number may be used in a multiprocessor system.