7545中文資料瑞薩數(shù)據(jù)手冊PDF規(guī)格書

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.