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The MC68HC705J1A is a member of the cost-effective, high-performance M68HC05 family of 8-bit microcontroller units (MCUs). All MCUs in the family use the popular M68HC05 central processor unit (CPU) and are available with a variety of subsystems, memory sizes and types and package types. On-chip memory of the MC68HC705J1A includes 1240B of user EPROM and 64B of user RAM.

Data Sheet

Reference Manual

Documentation

Quick reference to our documentation types

1-10 of 58 documents

Compact List

AN1516 Liquid Level Control Using a Pressure Sensor[AN1516]

PDFMay 16, 2005Rev 4
MISC Bus Follower Switch Node[AN1688]

PDFJul 11, 2002Rev 0
Software SCI Implementation to the MISC Communication Protocol[AN1667]

PDFJul 10, 2002Rev 0
Pulse Generation and Detection with Microcontroller Units[AN1067]

PDFMay 31, 2002Rev 1
Using the Serial Peripheral Interface to Communicate Between Multiple Microcomputers[AN991]

PDFJan 28, 2002Rev 1
Digital Direct Current Ignition System Using HC08 Microcontrollers[AN2159]

PDFNov 20, 2001Rev 0
Data Structures for 8-Bit Microcontrollers[AN1752]

PDFMay 7, 2001Rev 1
A Low-Power Wireless Remote Control Transmitter and Receiver[AN1833]

PDFNov 28, 2000Rev 0
Designing for Electromagnetic Compatibility (EMC) with HCMOS Microcontrollers[AN1050]

PDFJan 1, 2000Rev 0
Noise Reduction Techniques for Microcontroller-Based Systems[AN1705]

PDFJan 1, 1999Rev 0
Software I2C Communications[AN1820]

PDFJan 1, 1999Rev 0
Expanding Digital Input with an A/D Converter[AN1775]

PDFJan 1, 1998Rev 1
Add a Unique Silicon Serial Number to the HC05[AN1757]

PDFJan 1, 1998Rev 0
Programming the 68HC705J1A In-Circuit[AN1742]

PDFJan 1, 1998Rev 0
Interfacing the MC68HC705J1A to the DS1620 Digital Thermometer[AN1754]

PDFJan 1, 1998Rev 0
Precision Sine-Wave Tone Synthesis Using 8-Bit MCUs[AN1771]

PDFJan 1, 1998Rev 0
Add a Non-Volatile Clock to the MC68HC705J1A[AN1759]

PDFJan 1, 1998Rev 0
Add Addressable Switches to the HC05[AN1758]

PDFJan 1, 1998Rev 0
Interfacing the AD8402 Digital Potentiometer to the MC68HC705J1A[AN1760]

PDFJan 1, 1998Rev 0
Resetting Microcontrollers During Power Transitions[AN1744]

PDFJan 1, 1998Rev 0
Interfacing the HC705C8A to an LCD Module[AN1745]

PDFJan 1, 1998Rev 0
Interfacing MC68HC05 Microcontrollers to the IBM AT Keyboard Interface[AN1723]

PDFOct 30, 1997Rev 0
Digital Amplification Control of an Analog Signal Using the MC68HC705J1A[AN1730]

PDFJan 1, 1997Rev 0
Let the MC68HC705 Program Itself[AN499]

PDFJul 1, 1996Rev 0
Adding a Voice User Interface to M68HC05 Applications[AN1292]

PDFJan 1, 1996Rev 0
HC05 MCU Keypad Decoding Techniques Using the MC68HC705J1A[AN1239]

PDFJan 1, 1996Rev 1
Interfacing the MC68HC705J1A to 9356/9366 EEPROMs[AN1241]

PDFJan 1, 1995Rev 0
Designing for Electromagnetic Compatibility with Single-Chip Microcontrollers[AN1263]

PDFJan 1, 1995Rev 0
HC05 MCU LED Drive Techniques Using the MC68HC705J1A[AN1238]

PDFJan 1, 1995Rev 0
Simple Real-Time Kernels for M68HC05 Microcontrollers[AN1262]

PDFJan 1, 1995Rev 0
AN1259: System Design and Layout Techniques for Noise Reduction in MCU-Based Systems – Application Note[AN1259]

PDFJan 1, 1995Rev 0
HC05 MCU Software-Driven Asynchronous Serial Communication Techniques Using the MC68HC705J1A[AN1240]

PDFJan 1, 1995Rev 0
Simple A/D for MCUs without Built-In A/D Converters[AN477]

PDFJan 1, 1993Rev 0
Software Driver Routines for the MC68HC05 CAN Module[AN464]

PDFJan 1, 1993Rev 0
Arithmetic Waveform Synthesis with the HC05/08 MCUs[AN1222]

PDFJan 1, 1993Rev 0
Driving LCDs with M6805 Microprocessors[AN442]

PDFJan 1, 1991Rev 0
M6805 16-Bit Support Macros[AN1055]

PDFJan 1, 1990Rev 0

Software for AN1667, zip format[AN1667SW]

ZIPJul 31, 2002Rev 1.0
AN2159SW[AN2159SW]

ZIPMar 8, 2002Rev 1
Software files for AN1742 zipped[AN1742SW]

ZIPJan 1, 1998Rev 0
Software files for AN1820 zipped[AN1820SW]

ZIPJan 1, 1998Rev 0
Software files for AN1754 zipped[AN1754SW]

ZIPJan 1, 1998Rev 0
Software files for AN1730 zipped[AN1730SW]

ZIPJan 1, 1997Rev 0
Software files for AN1292 zipped[AN1292SW]

ZIPJan 1, 1996Rev 0
Software Files for AN1222 zipped[AN1222SW]

ZIPJan 1, 1995Rev 0
Software files for AN1239[AN1239SW]

ZIPJan 1, 1995Rev 0
Software files for AN1240 zipped[AN1240SW]

ZIPJan 1, 1995Rev 0
Software files for AN1241 zipped[AN1241SW]

ZIPJan 1, 1995Rev 0
Software files for AN1262[AN1262SW]

ZIPJan 1, 1995Rev 0

MC68HRC705J1A, MC68HSC705J1A, MC68HSR705J1A Technical Data - Data Sheet[MC68HC705J1A]

PDFMay 1, 2002Rev 4

68HC705J1A 8-Bit Microcontroller Unit: Mask Set Errata 1 - Errata[68HC705J1AMSE1]

PDFSep 23, 1996Rev 0

MC68HC05C4, C8, C9, MC68HC705C8, MC68HC805C4, MC68HCL05C4, C8, MC68HSC05C4, C8 Programming Reference[MC68HC05CXRG]

PDFFeb 23, 2000Rev 1
HC05 Family - Understanding Small Microcontrollers[M68HC05TB]

PDFJan 1, 1998Rev 2

Use of OSC2/XTAL as a Clock Output on Freescale Semiconductor Microcontrollers[EB396]

PDFJun 19, 2002Rev 0
RAM Data Retention Considerations for Freescale Semiconductor Microcontrollers[EB349]

PDFJun 22, 2000Rev 1
The MCAN Module[EB421]

PDFFeb 23, 2000Rev 0
Resetting MCUs[EB413]

PDFJan 1, 2000Rev 0
Frequently Asked Questions and Answers for the M68HC05 Family MCAN Module[EB181]

PDFJan 1, 1997Rev 0

Design Resources

Software

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1-5 of 6 software files

Code Snippets
Example routines

ZIPRev 0Oct 5, 2020 10:19:0040.34 KBSAMPPROGCOD

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Code Snippets
HC05 Software Example: Home Thermostat example using the 705C8 with indoor/outdoor temperature and time of day

ZIPRev 0Oct 5, 2020 10:19:0016.82 KBC8THERMSW

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Code Snippets
DOS based freeware assembler

ZIPRev 0Aug 6, 2002 00:00:0059.55 KBASHC5ASM

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Code Snippets
Old example files for 705J1A

ZIPRev 0Jan 28, 2000 00:00:0018.35 KBJ1AKEYPDCOD
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Connectivity Software
Framework file for 705J1A

ZIPRev n/aJan 28, 2000 00:00:009.51 KBH705JISW
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Connectivity Software
68HC05C0, HC705C8A, HC705J1A, and HC705KJ1 assembly framework files containing part specific information such as register equates, memory map specifics, and reset/interrupt vectors

ZIPRev n/aJan 28, 2000 00:00:0016.03 KBHC05AFRAME
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Microcontroller

Documentation

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Application Note (37)

AN1516 Liquid Level Control Using a Pressure Sensor[AN1516]

MISC Bus Follower Switch Node[AN1688]

Software SCI Implementation to the MISC Communication Protocol[AN1667]

Pulse Generation and Detection with Microcontroller Units[AN1067]

Using the Serial Peripheral Interface to Communicate Between Multiple Microcomputers[AN991]

Digital Direct Current Ignition System Using HC08 Microcontrollers[AN2159]

Data Structures for 8-Bit Microcontrollers[AN1752]

A Low-Power Wireless Remote Control Transmitter and Receiver[AN1833]

Designing for Electromagnetic Compatibility (EMC) with HCMOS Microcontrollers[AN1050]

Noise Reduction Techniques for Microcontroller-Based Systems[AN1705]

Software I2C Communications[AN1820]

Expanding Digital Input with an A/D Converter[AN1775]

Add a Unique Silicon Serial Number to the HC05[AN1757]

Programming the 68HC705J1A In-Circuit[AN1742]

Interfacing the MC68HC705J1A to the DS1620 Digital Thermometer[AN1754]

Precision Sine-Wave Tone Synthesis Using 8-Bit MCUs[AN1771]

Add a Non-Volatile Clock to the MC68HC705J1A[AN1759]

Add Addressable Switches to the HC05[AN1758]

Interfacing the AD8402 Digital Potentiometer to the MC68HC705J1A[AN1760]

Resetting Microcontrollers During Power Transitions[AN1744]

Interfacing the HC705C8A to an LCD Module[AN1745]

Interfacing MC68HC05 Microcontrollers to the IBM AT Keyboard Interface[AN1723]

Digital Amplification Control of an Analog Signal Using the MC68HC705J1A[AN1730]

Let the MC68HC705 Program Itself[AN499]

Adding a Voice User Interface to M68HC05 Applications[AN1292]

HC05 MCU Keypad Decoding Techniques Using the MC68HC705J1A[AN1239]

Interfacing the MC68HC705J1A to 9356/9366 EEPROMs[AN1241]

Designing for Electromagnetic Compatibility with Single-Chip Microcontrollers[AN1263]

HC05 MCU LED Drive Techniques Using the MC68HC705J1A[AN1238]

Simple Real-Time Kernels for M68HC05 Microcontrollers[AN1262]

AN1259: System Design and Layout Techniques for Noise Reduction in MCU-Based Systems – Application Note[AN1259]

HC05 MCU Software-Driven Asynchronous Serial Communication Techniques Using the MC68HC705J1A[AN1240]

Simple A/D for MCUs without Built-In A/D Converters[AN477]

Software Driver Routines for the MC68HC05 CAN Module[AN464]

Arithmetic Waveform Synthesis with the HC05/08 MCUs[AN1222]

Driving LCDs with M6805 Microprocessors[AN442]

M6805 16-Bit Support Macros[AN1055]

Application Note Software (12)

Software for AN1667, zip format[AN1667SW]

AN2159SW[AN2159SW]

Software files for AN1742 zipped[AN1742SW]

Software files for AN1820 zipped[AN1820SW]

Software files for AN1754 zipped[AN1754SW]

Software files for AN1730 zipped[AN1730SW]

Software files for AN1292 zipped[AN1292SW]

Software Files for AN1222 zipped[AN1222SW]

Software files for AN1239[AN1239SW]

Software files for AN1240 zipped[AN1240SW]

Software files for AN1241 zipped[AN1241SW]

Software files for AN1262[AN1262SW]

Data Sheet (1)

MC68HRC705J1A, MC68HSC705J1A, MC68HSR705J1A Technical Data - Data Sheet[MC68HC705J1A]

Errata (1)

68HC705J1A 8-Bit Microcontroller Unit: Mask Set Errata 1 - Errata[68HC705J1AMSE1]

Reference Manual (2)

MC68HC05C4, C8, C9, MC68HC705C8, MC68HC805C4, MC68HCL05C4, C8, MC68HSC05C4, C8 Programming Reference[MC68HC05CXRG]

HC05 Family - Understanding Small Microcontrollers[M68HC05TB]

Technical Notes (5)

Use of OSC2/XTAL as a Clock Output on Freescale Semiconductor Microcontrollers[EB396]

RAM Data Retention Considerations for Freescale Semiconductor Microcontrollers[EB349]

The MCAN Module[EB421]

Resetting MCUs[EB413]

Frequently Asked Questions and Answers for the M68HC05 Family MCAN Module[EB181]

Design Resources

Software

Filter by

Example routines

HC05 Software Example: Home Thermostat example using the 705C8 with indoor/outdoor temperature and time of day

DOS based freeware assembler

Old example files for 705J1A

Framework file for 705J1A

68HC05C0, HC705C8A, HC705J1A, and HC705KJ1 assembly framework files containing part specific information such as register equates, memory map specifics, and reset/interrupt vectors

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