HC05DX Datasheet | Next Electromics

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HC05DX Microcontroller Technical Summary

Overview

The HC05DX is a versatile 8-bit microcontroller family from Motorola (now NXP) featuring variants including the MC68HC05D24, MC68HC05D32, and MC68HC705D32. These devices combine a high-performance CPU core with integrated peripherals, making them suitable for embedded control applications. The architecture provides an optimal balance of processing power, memory resources, and I/O capabilities while maintaining low power consumption.

Key aspects of the HC05DX family include:

8-bit HC05 CPU core with enhanced instruction set
On-chip memory configurations varying by specific model
Multiple low-power modes for energy-sensitive applications
Comprehensive peripheral set including timers, serial interfaces, and PWM
Robust reset and interrupt handling capabilities

Features

Core Features

Fully static 8-bit HC05 CPU design
Upward compatible instruction set with M68HC05 family
16-bit stack pointer with stack manipulation instructions
Memory-mapped I/O registers
Multiple addressing modes including direct, extended, indexed, and relative

Memory Features

Varying ROM/EPROM sizes (model dependent):
- MC68HC05D24: 24KB ROM
- MC68HC05D32: 32KB ROM
- MC68HC705D32: 32KB EPROM
512 bytes to 1KB RAM (model dependent)
Memory expansion capability on select models

Peripheral Features

Parallel I/O ports with configurable direction control
Programmable timer subsystem with input capture/output compare
Serial Communications Interface (SCI) for UART functionality
Pulse Width Modulation (PWM) unit with 8-bit resolution
Watchdog timer for system reliability

System Features

Multiple reset sources (power-on, external, watchdog)
Comprehensive interrupt structure with priority control
STOP and WAIT low-power modes
On-chip clock generator with optional external oscillator

Applications

The HC05DX microcontroller family is designed for a wide range of embedded control applications, including:

Industrial control systems
Automotive electronics
Consumer appliances
Security systems
Medical devices
HVAC control
Power management systems
Motor control applications
Sensor interfaces
Remote monitoring devices

Electrical Characteristics

Absolute Maximum Ratings

Supply Voltage (VDD): -0.3V to +7.0V
Input Voltage (any pin): -0.3V to VDD+0.3V
Operating Temperature Range: -40°C to +85°C
Storage Temperature Range: -55°C to +150°C

Recommended Operating Conditions

Supply Voltage (VDD): 4.5V to 5.5V (5V operation)
Supply Voltage (VDD): 2.7V to 5.5V (low voltage operation)
Operating Temperature: -40°C to +85°C (industrial)
Clock Frequency: DC to 4MHz (5V), DC to 2MHz (3V)

Power Consumption

Active Mode (4MHz, 5V): 10mA typical
Wait Mode (4MHz, 5V): 2.5mA typical
Stop Mode (5V): 50μA maximum

I/O Characteristics

Input High Voltage (VIH): 0.7VDD min
Input Low Voltage (VIL): 0.2VDD max
Output High Voltage (IOH = -1mA): VDD-0.5V min
Output Low Voltage (IOL = 5mA): 0.4V max
Input Leakage Current (any pin): ±1μA max

Package Information

The HC05DX family is available in multiple package options to suit different application requirements:

Plastic Dual In-line Package (PDIP)

40-pin configuration
0.6" wide body
Lead pitch: 0.1" (2.54mm)
Operating temperature: -40°C to +85°C

Plastic Leaded Chip Carrier (PLCC)

44-pin configuration
JEDEC standard footprint
Lead pitch: 0.05" (1.27mm)
Surface mount compatible

Shrink Small Outline Package (SSOP)

44-pin configuration
0.209" body width
Lead pitch: 0.0256" (0.65mm)
Low-profile surface mount package

Ordering Information

The HC05DX family offers several ordering options based on memory configuration, package type, and temperature range. The standard part numbering scheme is as follows:

MC68HC05D24: 24KB ROM version
MC68HC05D32: 32KB ROM version
MC68HC705D32: 32KB EPROM version

Suffix codes indicate package type and temperature range:

P: 40-pin PDIP (commercial temperature)
FN: 44-pin PLCC (industrial temperature)
DW: 44-pin SSOP (extended temperature)

Development Support

Motorola (now NXP) provides comprehensive development support for the HC05DX family, including:

Evaluation boards and starter kits
In-circuit emulators
C compilers and assemblers
Debugging tools
Application notes and technical documentation

Conclusion

The HC05DX microcontroller family offers a robust combination of processing power, integrated peripherals, and flexible memory options suitable for a wide range of embedded control applications. With its low-power capabilities, comprehensive peripheral set, and multiple package options, the HC05DX provides designers with a versatile solution for cost-sensitive applications requiring reliable 8-bit performance.

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