DESCRIPTION
The 7549 Group is the 8-bit microcomputer based on the 740 family core technology.
The 7549 Group has an 8-bit timer, 16-bit timer, serial interface, A/D converter, power-on reset circuit and the low voltage detection circuit. Also, the Function set ROM is equipped.

FEATURES
• Basic machine-language instructions ..................................71
• The minimum instruction execution time ................... 0.25 µs
              (at 8 MHz oscillation frequency, double-speed mode)
• Memory size
   ROM ..................................... 2K, 4K, 6K bytes
   RAM ........................................... 192/256 bytes
• Programmable I/O ports
   I/O port............................................................19
   Output port........................................................1
• Key-on wakeup.......................................................................8
• LED direct drive port..............................................................8
• Interrupts ............................................. 12 sources, 12 vectors
• Timers            ....................................................................... 8-bit × 2
              ..................................................................................16-bit × 1
• Output compare ........................................................ 3 channel
• Input capture ............................................................. 1 channel
• Serial interface............................................................ 8-bit × 1
                                                     (UART or clock synchronous)
• A/D converter ............................ 10-bit resolution × 8-channel
• Clock generating circuit ..................................... Built-in type
   (connect to external ceramic resonator or quartz-crystal oscillator,
                                         32 kHz quartz-crystal oscillation available)
• High-speed on-chip oscillator ............................ Typ. : 4 MHz
• Low-speed on-chip oscillator .......................... Typ. : 250 kHz
• Watchdog timer ...................................................... 16-bit × 1
• Power-on reset circuit.......................................... Built-in type
• Low voltage detection circuit .............................. Built-in type
• Power source voltage
   XIN oscillation frequency
   (at ceramic resonator, in double-speed mode)
      At 8 MHz ........................................ 4.5 to 5.5 V
      At 2 MHz ........................................ 2.4 to 5.5 V
      At 1 MHz ........................................ 2.2 to 5.5 V
   XIN oscillation frequency
   (at ceramic resonator, in high-speed mode)
      At 8 MHz ........................................ 4.0 to 5.5 V
      At 4 MHz ........................................ 2.4 to 5.5 V
      At 1 MHz ........................................ 1.8 to 5.5 V
   High-speed on-chip oscillator oscillation frequency
      At 4 MHz......................................... 4.0 to 5.5 V
   Low-speed on-chip oscillator oscillation frequency
      At 250 kHz (typ. value at VCC = 5V).... 1.8 to 5.5 V
• Power dissipation ........................................................ 30 mW
• Operating temperature range ............................... -20 to 85°C

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