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.