DESCRIPTION

The 7545 Group is the 8-bit microcomputer based on the 740 family core technology.

The 7545 Group has an 8-bit timer, power-on reset circuit and the voltage drop detection circuit. Also, Function set ROM is equipped.

FEATURES

• Basic machine-language instructions .................................. 71

• The minimum instruction execution time .................... 2.00 µs

(at 4 MHz oscillation frequency for the shortest instruction)

• Memory size ROM ........................................ 4K to 60K bytes

RAM ............................................ 256, 512 bytes

• Programmable I/O ports ...................................................... 25

• Key-on wakeup input .................................................. 8 inputs

• LED output port...................................................................... 8

• Interrupts.................................................... 7 sources, 7 vectors

• Timers .......................................................................... 8-bit × 3

• Carrier wave generating circuit .......1 channel (8-bit timer × 2)

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

(connect to external ceramic resonator or quartz-crystal oscillator)

• Watchdog timer .........................................................16-bit × 1

• Power-on reset circuit............................................ Built-in type

• Voltage drop detection circuit................................Built-in type

• Power source voltage

XIN oscillation frequency at ceramic/quartz-crystal oscillation

At 4 MHz .......................................... 1.8 to 3.6 V

• Power dissipation .......................................................... 1.8mW

• Operating temperature range .................................−20 to 85 °C

APPLICATION

Remote control transmit.