Introduction

The MC68HC05PV8, MC68HC805PV8 and MC68HC05PV8A microcontrollers are members of Motorola’s 68HC05 family, designed for low-cost and single-chip systems in automotive applications. They combine an HC05 core with a shell of high-voltage peripherals. Throughout this book, the term MC68HC(8)05PV8/A is used to refer to all three MCUs.

The ROM (MC68HC05PV8) version of the MCU contains the HC05 CPU with integrated voltage regulator, RAM, ROM, EEPROM, core timer, COP watchdog, power-on reset, 16-bit programmable timer, PWM generator, standard parallel I/O, and special I/O for the automotive voltage range, including relay driver and contact monitors. Bootloader and test modes are supported. The package is 28-pin SOIC for the ROM and development version.

Features

Features of the MC68HC(8)05PV8/A include:

• HC05 Core

• 28 Pin SOIC Package

• Program EEPROM or ROM

   – MC68HC805PV8: 7936 Bytes of Program EEPROM + 240 Bytes of Monitor ROM + 16 Bytes User Vectors

   – MC68HC05PV8: 7936 Bytes of ROM + 240 Bytes of Monitor ROM + 16 Bytes User Vectors

• 192 Bytes of RAM Including Stack

• 128 Bytes of Data EEPROM

• On-Chip 5V (±5%) Voltage Regulator including Power-On Reset, with 20mA supply for External Devices. VSUP Range is 6V to 16V.

   Limited operation above and below that range. Breakdown Voltage above 40V.

• On-Chip Oscillator with External Resonator. Internal bus Frequency in Run and Wait Mode is fOSC÷2.

• Multipurpose Core Timer, Real Time Interrupt (RTI), (Window) COP Watchdog Timer

• 16-Bit Timer With Two Input Captures and Two Output Compares

• 1 Channel High-Speed PWM With Adjustable Frame Frequency

• 8 bit 6 Channel A/D Converter

• Port A: 8 Channel 5V I/O, with Pull-Ups, Shared with A/D Converter

• Port B: 5 Channel 5V I/O Shared with Timer and PWM

• Port C: 7 channel 40V I/O

   – 5 Channel 10mA Contact Monitor, 1 for a Switch to Ground, 1 for a Switch to Battery and 3 of Universal Type. Contact Monitoring Requires a 1KΩ External Resistor. Contact Monitor Pins May Alternatively be Configured as High-Voltage I/O Relative to VSUP. Pins are Shared with Timer and PWM.

   – 2 Channel 2Ω LS Relay Driver. The Pins are Shared with the PWM.

• Break-Down Voltage of High-Voltage Pins is greater than 40V.

• High-Voltage Interrupt/Reset (HVI/HVR) and Low-Voltage Reset (LVR).

• –40°C to 125°C Junction Temperature.

• Operational Amplifier, Connected to PA4–6

• Keyboard Wake-Up Interrupt on Port A and PC4–0

• ISO9141 Compatible Transceiver on Port C4

• Ultra Low Power Mode on 68HC05PV8A