Features

Features on the MC68HC705KJ1 include:

• Robust Noise Immunity

• 4.0-MHz Internal Operating Frequency at 5.0 V

• 1240 Bytes of EPROM/OTPROM (Electrically Programmable

Read-Only Memory/One-Time Programmable Read-Only

Memory), Including Eight Bytes for User Vectors

• 64 Bytes of User RAM

• Peripheral Modules

– 15-Stage Multifunction Timer

– Computer Operating Properly (COP) Watchdog

• 10 Bidirectional Input/Output (I/O) Lines, Including:

– 10-mA Sink Capability on All I/O Pins

– Software Programmable Pulldowns on All I/O Pins

– Keyboard Scan with Selectable Interrupt on Four I/O Pins

– 5.5-mA Source Capability on Six I/O Pins

• Selectable Sensitivity on External Interrupt (Edge- and Level-Sensitive or Edge-Sensitive Only)

• On-Chip Oscillator with Connections for:

– Crystal

– Ceramic Resonator

– Resistor-Capacitor (RC) Oscillator (MC68HRC705KJ1) with or without External Resistor

– External Clock

– Low-Speed (32-kHz) Crystal (MC68HLC705KJ1)

• Memory-Mapped I/O Registers

• Fully Static Operation with No Minimum Clock Speed

• Power-Saving Stop, Halt, Wait, and Data-Retention Modes

• External Interrupt Mask Bit and Acknowledge Bit

• Illegal Address Reset

• Internal Steering Diode and Pullup Resistor from RESET Pin to VDD

• Selectable EPROM Security1

• Selectable Oscillator Bias Resistor