Maximum Ratings, Thermal Characteristics | Motorola MC68340 instruction

Freescale Semiconductor, Inc.

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SECTION 11 ELECTRICAL CHARACTERISTICS

This section contains detailed information on power considerations, DC/AC electrical characteristics, and AC timing specifications of the MC68340. Refer to Section 12 Ordering Information and Mechanical Data for specific part numbers corresponding to voltage, frequency, and temperature ratings.

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11.1 MAXIMUM RATINGS

Rating	Symbol	Value	Unit
Supply Voltage 1, 2	V	–0.3 to +6.5	V
	CC
Input Voltage1, 2	Vin	–0.3 to +6.5	V
Operating Temperature Range	TA	0 to 70	°C
		or
		–40 to +85
Storage Temperature Range	Tstg	–55 to +150	°C

NOTES:

1.Permanent damage can occur if maximum ratings are exceeded. Exposure to voltages or currents in excess of recommended values affects device reliability. Device modules may not operate normally while being exposed to electrical extremes.

2.Although sections of the device contain circuitry to protect against damage from high static voltages or electrical fields, take normal precautions to avoid exposure to voltages higher than maximum-rated voltages.

This device contains protective circuitry against damage due to high static voltages or electrical fields; however, it is advised that normal precautions be taken to avoid application of any voltages higher than maximum-rated voltages to this high-impedance circuit. Reliability of operation is enhanced if unused inputs are tied to an appropriate logic voltage level (e.g., either GND or V CC ).

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The following ratings define a range of conditions in which the device will operate without being damaged. However, sections of the device may not operate normally while being exposed to the electrical extremes.

11.2 THERMAL CHARACTERISTICS

Characteristic	Symbol Value	Unit
Thermal Resistance—Junction to Case	θJC	°C/W
Ceramic 144-Pin QFP	6
Ceramic 144-Pin QFP	TBD
Plastic 145-Pin PGA	TBD
Plastic 145-Pin PGA
Thermal Resistance—Junction to Ambient	θJA	°C/W
Ceramic 144-Pin QFP	33
Ceramic 144-Pin QFP	27*
Plastic 145-Pin PGA	27*
Plastic 145-Pin PGA
* Estimated

MOTOROLAMC68340 USER’S MANUAL11-1

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MC68340 specifications

The Motorola MC68340 is a highly integrated microprocessor that was introduced in the early 1990s. It belongs to the 68000 family of microprocessors and is designed to cater to the demands of embedded systems, particularly in telecommunications and networking applications. This chip represents a significant evolution in microprocessor technology by combining a microprocessor core with additional peripherals on a single chip, making it an attractive solution for engineers looking to design compact and efficient systems.

One of the key features of the MC68340 is its 32-bit architecture, which allows for significant processing power and data handling capabilities. This architecture enables the processor to handle larger data sizes and perform more complex calculations compared to its 16-bit predecessors. The MC68340 operates at clock speeds typically ranging from 16 MHz to 25 MHz. Its dual instruction pipeline enhances throughput, allowing for simultaneous instruction fetches and executions, which significantly boosts performance.

A notable characteristic of the MC68340 is the inclusion of integrated peripherals, which help reduce the overall component count in a system. Key integrated components include a memory management unit (MMU), a direct memory access (DMA) controller, and various communication interfaces such as serial ports. The memory management capabilities enhance the processor's ability to manage memory resources efficiently, enabling it to support multitasking environments commonly found in modern computing.

In terms of connectivity, the MC68340 features connections for both synchronous and asynchronous serial communication, making it well-suited for networking tasks. The processor supports a range of bus standards, including address and data buses, which facilitate seamless interaction with peripheral devices.

Another important aspect of the MC68340 is its flexibility. The processor supports multiple operating modes, including multiple CPU configurations and compatibility with the Motorola 68000 family, allowing for easier integration into existing systems.

Moreover, the MC68340 boasts low power consumption compared to many of its contemporaries, making it an excellent choice for battery-operated applications, enhancing its appeal in sectors like telecommunications, industrial control, and automotive systems. Its combination of performance, integration, versatility, and efficiency has secured the MC68340 a reputable position in the annals of embedded systems technology, proving to be a valuable asset for developers and engineers alike.

Motorola MC68340 manual Maximum Ratings, Thermal Characteristics, Rating Symbol Value Unit

Models: MC68340

Freescale Semiconductor, Inc.

SECTION 11

ELECTRICAL CHARACTERISTICS

11.1 MAXIMUM RATINGS

Rating

Symbol

Value

Unit

Freescale

11.2 THERMAL CHARACTERISTICS

Characteristic

Symbol Value

Unit

MC68340 specifications