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
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