MC68A21

Advance Inforlll.ation 1.5 AND 2.0 MHz COMPONENTS FOR THE M6800 MICROCOMPUTER SYSTEM The eight devices described in this data sheet extend the operating frequency of the M6800 Microcomputer Family. The block diagrams and device operation are the same as for the basic M6800-series components. Fully Hardware and Software Compatible with the M6800 Family Power Dissipation Approximately 20% Lower Than on Standard MC6800 Series Clock Specification Improved for Reduced Complexity of Clock Generator/Driver Circuitry The MC6821 and its higher-frequency versions provide drive capability of two TTL loads on all A- and B-side buffers, improving the drive capability of the MC6820. 1.5 MHz 2.0 MHz MC68AOO·MC68BOO MPH MC68A21· MC68B21 PIA MC68A50·MC68B50 ACIA MCM68AIO· MCM68BIO RAM MOS (N-eHANNEL, SILICON-GATE) MICROPROCESSOR SYSTEM COMPONENTS M6800 MICROCOMPUTER FAMILY BLOCK DIAGRAM MC68AOO Microprocessor MC68BOO P SUFFIX PLASTIC PACKAGE CASE 711 NOT SHOWN: L SUFFIX CERAMIC PACKAGE CASE 715 Address Bus This is advance information and specifications are subject to change without notice. For additional information on these devicesincluding block diagrams, signal descriptions, device operation and pin assignments-refer to the M6800 Microcomputer System Design Data brochure. ©MOTOROLA INC., 1977 ADI-429 MICROPROCESSING UNIT (MPU) MC68AOO MC68BOO ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, ±5%, VSS = 0, T A = 0 to 700 C unless otherwise noted.) Input High Voltage Input L...