MC68HC705J1ACP Datasheet PDF - Freescale

●General Description

●Introduction

●The MC68HC705J1A is a member of Motorola’s low-cost, high-performance M68HC05 Family of 8-bit microcontroller units (MCUs). The M68HC05 Family is based on the customer-specified integrated circuit (CSIC) design strategy. All MCUs in the family use the popular M68HC05 central processor unit (CPU) and are available with a variety of subsystems, memory sizes and types, and package types.

●Features

●Features of the MC68HC705J1A include:

●• Peripheral modules:

●– 15-stage multifunction timer

●– Computer operating properly (COP) watchdog

●• 14 bidirectional input/output (I/O) lines, including:

●– 10-mA sink capability on four I/O pins

●– Mask option register (MOR) and software programmable pulldowns on all I/O pins

●– MOR selectable interrupt on four I/O pins, a keyboard scan feature

●• MOR 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

●– External clock

●• 1240 bytes of EPROM/OTPROM, including eight bytes for user vectors

●• 64 bytes of user random-access memory (RAM)

●• 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 RESETpin to VDD