■ 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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