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DESCRIPTION

The 7531 Group is the 8-bit microcomputer based on the 740 family core technology.

The 7531 Group has a serial I/O, 8-bit timers, and an A-D converter, and is useful for control of home electric appliances and office automation equipment.

FEATURES

? Basic machine-language instructions ....................................... 69

? The minimum instruction execution time .......................... 0.50 μs

(at 8 MHz oscillation frequency for the shortest instruction, in high-speed mode)

? Memory size ROM .............................................. 8K to 16K bytes

RAM .............................................. 256 to 384 bytes

? Programmable I/O ports ........................................................... 29

(25 in 32-pin version)

? Interrupts .................................................... 12 sources, 8 vectors

(11 sources, 8 vectors for 32-pin version)

? Timers ............................................................................ 8-bit ? 3

? Serial I/O1 ...................................................................... 8-bit ? 1

(UART)

? Serial I/O2 ...................................................................... 8-bit ? 1

(Clock-synchronized)

? A-D converter ................................................ 10-bit ? 8 channels

(6 channels for 32-pin version)

? Clock generating circuit ............................................. Built-in type

(connect to external ceramic resonator or quartz-crystal oscillator

permitting RC oscillation)

? Watchdog timer ............................................................ 16-bit ? 1

? Power source voltage

At 8 MHz XIN oscillation frequency at ceramic oscillation

................................................................................... 4.0 to 5.5 V

At 4 MHz XIN oscillation frequency at ceramic oscillation

................................................................................... 2.4 to 5.5 V

At 2 MHz XIN oscillation frequency at ceramic oscillation

................................................................................... 2.2 to 5.5 V

At 4 MHz XIN oscillation frequency at RC oscillation

................................................................................... 4.0 to 5.5 V

At 2 MHz XIN oscillation frequency at RC oscillation

................................................................................... 2.4 to 5.5 V

At 1 MHz XIN oscillation frequency at RC oscillation

................................................................................... 2.2 to 5.5 V

? Power dissipation ............................................ 25 mW (standard)

? Operating temperature range ................................... –20 to 85 °C

(–40 to 85 °C or –40 to 125 °C for extended operating temperature version)

APPLICATION

Office automation equipment, factory automation equipment, home electric appliances, consumer electronics, car, etc.