MC68HC705KJ1CDW Datasheet PDF - Freescale

●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