■ DESCRIPTION
The MB90570A/570C series is a general-purpose 16-bit microcontroller developed and designed by Fujitsu for process control applications in consumer products that require high-speed real time processing. It contains an I2C bus interface that allows inter-equipment communication to be implemented readily. This product is well adapted to car audio equipment, VTR systems, and other equipment and systems.

■ FEATURES
• Clock
    Embedded PLL clock multiplication circuit
    Operating clock (PLL clock) can be selected from 1/2 to 4× oscillation (at oscillation of 4 MHz, 4 MHz to 16 MHz).
    Minimum instruction execution time: 62.5 ns (at oscillation of 4 MHz, 4× PLL clock, operation at VCC of 5.0 V)
• Maximum memory space
    16 Mbytes
• Instruction set optimized for controller applications
    Rich data types (bit, byte, word, long word)
    Rich addressing mode (23 types)
    Enhanced signed multiplication/division instruction and RETI instruction functions
    Enhanced precision calculation realized by the 32-bit accumulator
• Instruction set designed for high level language (C) and multi-task operations
    Adoption of system stack pointer
    Enhanced pointer indirect instructions
    Barrel shift instructions
• Program patch function (for two address pointers)
• Enhanced execution speed
    4-byte instruction queue
• Enhanced interrupt function
    8 levels, 34 factors
• Automatic data transmission function independent of CPU operation
    Extended intelligent I/O service function (EI2OS): Up to 16 channels
• Embedded ROM size and types
    Mask ROM: 128 kbytes/256 kbytes
    Flash ROM: 256 kbytes
    Embedded RAM size:6 kbytes/10 kbytes (mask ROM)
                                       10 kbytes (flash memory)
                                       10 kbytes (evaluation device)
• Low-power consumption (standby) mode
    Sleep mode (mode in which CPU operating clock is stopped)
    Stop mode (mode in which oscillation is stopped)
    CPU intermittent operation mode
    Hardware standby mode
• Process
    CMOS technology
• I/O port
    General-purpose I/O ports (CMOS): 63 ports
    General-purpose I/O ports (with pull-up resistors): 24 ports
    General-purpose I/O ports (open-drain): 10 ports
    Total: 97 ports
• Timer
    Timebase timer/watchdog timer: 1 channel
    8/16-bit PPG timer: 8-bit × 2 channels or 16-bit × 1 channel
• 8/16-bit up/down counter/timer: 1 channel (8-bit × 2 channels)
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