MC68HC705C9ACFN

Series:	HC05
Packaging:	Tube
Part Status:	Obsolete
Core Processor:	HC05
Core Size:	8-Bit
Speed:	2.1MHz
Connectivity:	SCI, SPI
Peripherals:	POR, WDT
Number of I/O:	24
Program Memory Size:	16KB (16K x 8)
Program Memory Type:	OTP
EEPROM Size:	--
RAM Size:	352 x 8
Voltage - Supply (Vcc/Vdd):	3 V ~ 5.5 V
Data Converters:	--
Oscillator Type:	Internal
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	44-LCC (J-Lead)
Supplier Device Package:	44-PLCC (16.59x16.59)
Base Part Number:	MC68HC705

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MC68HC705C9ACFN application field and working principle

Introduction

The MC68HC705C9ACFN is a single chip microcontroller (MCU) manufactured by Freescale Semiconductor (formerly Motorola). It is based on Motorola’s 8-bit low-cost MC68HC05 family and is designed to help entry-level systems designers with cost and space advantages. The HC05 family boasts an 11MHz internal oscillator, which allows for either single-chip or multiple-chip systems solutions. The MC68HC705C9ACFN is part of Freescale’s 8-bit microcontroller series and is suitable for many consumer, industrial, and automotive applications.

Application Fields

The MC68HC705C9ACFN is used in a variety of consumer, industrial, and automotive applications. Consumer applications include calculator systems and scanning systems. Industrial applications include machine control and process control. Automotive applications include engine systems, transmission systems, and airbag control. Additionally, the MC68HC705C9ACFN can be used to control robots, microwave ovens, and LCD displays.

Working Principle

MC68HC705C9ACFN comes with its own on-chip flash memory, which allows for easy programming and debugging. The flash memory can store up to 64K bytes of code, which is enough for most application programs. The MC68HC705C9ACFN also has 15 I/O ports, which allow for the connection of external devices including keyboards, displays, and storage.The MC68HC705C9ACFN has an 8 bit bus width, allowing for higher speeds and greater accuracy. The MCU also has a handful of 16-bit specialized instructions, including a Multi-input Add accumulator, Single-operand Access Store, Multi-add Long and Move Multiple instructions. The instructions are used to perform common operations such as arithmetic calculations and data transfers.The MC68HC705C9ACFN has an internal clock speed of 11MHz, and an instruction cycle time of 1 microsecond. This means that up to 100,000 instructions can be executed in one second. A multitude of interrupts can be configured and enabled and disabled at any time. The external interrupts can also be masked to allow higher performance execution.

Summary

The MC68HC705C9ACFN is a single chip microcontroller from Freescale Semiconductor. It is designed for cost and space advantages and is suitable for many consumer, industrial and automotive applications. The microcontroller has its own on-chip flash memory to store code, and 15 I/O ports for connection of external devices. The MCU has a 8-bit bus width and 16-bit specialized instructions for performing common operations. It also has an internal clock speed of 11MHz with an instruction cycle time of 1 microsecond, and can support multiple interrupts.

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