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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 security(1)

? Selectable oscillator bias resistor