Introduction
The MC68HC05RC17 is a general-purpose, low-cost addition to the M68HC05 Family of microcontroller units (MCUs) and is suitable for remote control applications. It contains the HC05 central processing unit (CPU) core, including the 14-stage core timer with real-time interrupt (RTI) and computer operating properly (COP) watchdog systems. On chip peripherals include a carrier modulator transmitter. The 16-Kbyte memory map has 15,936 bytes of user ROM and 352 bytes of RAM. There are 18 input-output (I/O) lines (eight having keyscan logic and pullups) and a low-power reset pin.

General Description
The MC68HC05RC17 is available in 28-pin small outline integrated circuit (SOIC) or plastic dual in-line package (PDIP) packages. Four additional I/O lines are available for bond out in higher pin count packages.

FEATUREs
Features of the MC68HC05RC17 include:
• Low Cost
• HC05 Core
• 28-Pin SOIC or DIP Packages
• On-Chip Oscillator with 32.768-kHz Crystal/Ceramic Resonator
• Phase-Locked Loop (PLL) Synthesizer with Programmable Speed
• 15,936 Bytes of User ROM
• 64 Bytes of Burn-In ROM
• 352 Bytes of On-Chip RAM
• 14-Stage Core Timer with Real-Time Interrupt (RTI) and Computer Operating Properly (COP) Watchdog Circuits
• Carrier Modulator Transmitter Supporting Baseband, Pulse Length Modulator (PLM), and Frequency Shift Keying (FSK) Protocols
• Low-Power Reset Pin
• 18 Bidirectional I/O Lines (Four Additional I/O Lines Available for Bond Out in Higher Pin Count Packages)
• Mask Programmable Pullups and Interrupt on Eight Port Pins (PB0–PB7)
• High-Current Infrared (IR) Drive Pin
• High-Current Port Pin (PC0)