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 MΩ

• 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