Harman Kardon FL8550 Service Manual

Also see for FL 8550: Brochure Owner's manual

Contents

HD6433724E93F MICROPROCESSOROverviewThe H8/300L Series is a single-chip microcomputer (MCU: microcomputer unit),built around the high-speed H8/300L CPU and equipped with peripheral systemfunctions on chip.The H8/3724 and H8/3754 Series are single-chip microcomputers in the H8/300LSeries equipped with high-voltage pins. Their on-chip peripheral functions include avacuum fluorescent display (VFD) controller/driver, timers, a 14-bit PWM (pulsewidth modulator), two serial communication interface channels, and an analog-to-digital converter. Together these functions make this chip ideally suited to use as amicrocontroller in embedded systems requiring a VFD display.The H8/3724 and H8/3754 Series come in the following memory configurations forvarious system scale needs.H8/3723: 24-kbyte ROM, 384-byte RAMH8/3724: 32-kbyte ROM, 512-byte RAMH8/3725: 40-kbyte ROM, 640-byte RAMH8/3726: 48-kbyte ROM, 1,024-byte RAMH8/3753: 24-kbyte ROM, 1,024-byte RAMH8/3754: 32-kbyte ROM, 1,024-byte RAMIn addition to masked ROM versions available for the H8/3724 Series, H8/3724 andH8/3726 are also available in ZTATTM versions which allow the user to freelyprogram the on-chip PROM.Note: * ZTAT (zero turn around time) is a trademark of Hitachi, Ltd.FL855058