Test Signals, Synthesizer Power Vccsyn | Motorola MC68340 specification

Freescale Semiconductor, Inc.

2.15 TEST SIGNALS

The following signals are used with the on-board test logic defined by the IEEE 1149.1 standard. See Section 9 IEEE 1149.1 Test Access Port for more information on the use of these signals.

2.15.1 Test Clock (TCK)

This input provides a clock for on-board test logic defined by the IEEE 1149.1 standard.

2.15.2 Test Mode Select (TMS)

This input controls test mode operations for on-board test logic defined by the IEEE 1149.1 standard.

2.15.3 Test Data In (TDI)

This input is used for serial test instructions and test data for on-board test logic defined by the IEEE 1149.1 standard.

2.15.4 Test Data Out (TDO)

This output is used for serial test instructions and test data for on-board test logic defined by the IEEE 1149.1 standard.

2.16 SYNTHESIZER POWER (VCCSYN)

This pin supplies a quiet power source to the VCO to provide greater frequency stability. It is also used to control the synthesizer mode after reset. See Section 4 System Integration Module for more information.

2.17 SYSTEM POWER AND GROUND (VCC AND GND)

These pins provide system power and ground to the MC68340. Multiple pins are provided for adequate current capability. All power supply pins must have adequate bypass capacitance for high-frequency noise suppression.

2.18 SIGNAL SUMMARY

Table 2-5 presents a summary of all the signals discussed in the preceding paragraphs.

MOTOROLAMC68340 USER’S MANUAL2- 13

For More Information On This Product,

Go to: www.freescale.com

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 Test Signals, Synthesizer Power Vccsyn, System Power and Ground VCC and GND

Models: MC68340

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

2.15 TEST SIGNALS

2.15.2 Test Mode Select (TMS)

2.15.3 Test Data In (TDI)

2.15.4 Test Data Out (TDO)

2.16 SYNTHESIZER POWER (VCCSYN)

2.17 SYSTEM POWER AND GROUND (VCC AND GND)

2.18 SIGNAL SUMMARY

MC68340 specifications