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.