MC146805H2

® MOTOROLA MC14680SH2 Advance Information I 8-BIT MICROCOMPUTER UNIT The MC146805H2 Microcomputer Unit (MCU) belongs to the M146805 CMOS Family of low-cost, single-chip microcomputers. This 8-bit MCU contains an on-chip oscillator, CPU, RAM, 1/0, and a timer. The fully static design allows operation at two software selectable frequencies, further reducing its already low power consumption. It is a low-power processor designed for low-end to mid-range applications in the consumer, automotive, industrial, and communications market where very low power consumption constitutes an important factor. The following are the major features of the MC146805H2 MCU. HARDWARE FEATURES Typical Full Speed Operating Power of 20 mW at 5 V Typical WAIT Mode Power of 4 mW Typical STOP Mode Power of 5 /LW 8-Bit Architecture Fully Static Operation 112 Bytes of On-Chip RAM 2048 Bytes on On-Chip ROM 24 Bidirectional 1/0 Lines Plus Four Input-Only Lines Internal 8-Bit Timer with Software Programmable 7-Bit Prescaler Watchdog Timer External Timer Input External and Timer Interrupts Self-Check Mode Master Reset and Power-On Reset Single 3- to 6-Volt Supply On-Chip Oscillator 4O-Pin Dual-in-Line Package Chip Carrier Also Available Alert Tone Generator Frequency Synthesizer SOFTWARE FEATURES Similar to the MC6800 Efficient Use of Program Space Versatile Interrupt Handling True Bit Manipulation Addressing Modes with Indexed Addressing for Tables Effic...