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Introduction

The Freescale MC68HC05JJ6 and MC68HC05JP6 are ROM versions of the M68HC705JJ and M68HC705JP Families of microcontrollers.

Features

? Low-Cost, HC05 Core MCU in 20-Pin Package (MC68HC05JJ6) or 28-Pin Package (MC68HC05JP6)

? 6160 Bytes of User ROM, Including 8 Bytes of Security Code and 16 Bytes of User Vectors

? 224 Bytes of Low-Power User RAM (4 Transistor RAM)

? 16-Bit Programmable Timer with Input Capture and Output Compare

? 15-Stage Core Timer, Including 8-Bit Free-Running Counter and 4-Stage, Selectable Real-Time Interrupt Generator

? Simple Serial Input/Output Port (SIOP) with Interrupt Capability

? Two Voltage Comparators which Can be Combined with the 16-Bit Programmable Timer to Create a 4-Channel, Single-Slope Analog-to-Digital (A/D) Converter

? Voltage Comparator 1 Output Can Drive the PB4 Port Pin Directly under Software Control

? 14 Input/Output (I/O) Lines (MC68HC05JJ6) or 22 I/O Lines (MC68HC05JP6), Including High-Source/Sink Current Capability on Six I/O Pins (MC68HC05JJ6) or 14 I/O Pins (MC68HC05JP6)

? Mask Option Selectable Software Programmable Pulldowns on All I/O Pins and Keyboard Scan Interrupt on Four I/O Pins

? Software Mask and Request Bit for IRQ Interrupt with Mask Option Selectable Sensitivity on IRQ Interrupt (Edge- and Level-Sensitive or Edge-Only)

? ROM Security Bytes1 to Aid in Locking Out Access to ROM Array

? Mask Option Selectable Computer Operating Properly (COP) Watchdog System

? On-Chip Temperature Measurement Diode

? Mask Option Selectable Low-Voltage Inhibit to Reset CPU in Low Voltage Conditions

? On-Chip Oscillator with Device Selection of Crystal/Ceramic Resonator or RC Operation and Mask Option Selectable Shunt Resistor, Approximately 2 M?

? Internal Oscillator for Lower-Power Operation, Approximately 100 kHz (500 kHz Selected as a Mask Option)

? Power-Saving Stop Mode and Wait Mode Instructions (Mask Option Selectable STOP Conversion to Halt and Separate Mask Option for Fast 16-Cycle Restart)

? Illegal Address Reset

? Internal Steering Diode and Pullup Device on RESET Pin to VDD