CCR1, CCR2

Freescale Semiconductor, Inc.

$788, $7A8

INTB

INTN

INTE

ECO

SAPI

DAPI

SSIZE

DSIZE

REQ

S/D

STR

RESET:

U = Unaffected by reset

Supervisor/User

INTB—Interrupt Breakpoint

Setting the interrupt breakpoint bit sets the BRKP bit in the CSR. The logic AND of INTB and BRKP generates an interrupt request.

1 = Enables an IRQ≈ when a breakpoint is recognized and the channel is the bus master.

0 = Does not enable an IRQ≈ when a breakpoint is recognized and the channel is the bus master.

INTN—Interrupt Normal

1 = Enables an IRQ≈ when the channel finishes a transfer without an error condition (CSR DONE bit is set).

0 = Does not enable an IRQ≈ when the channel finishes a transfer without an error condition.

INTE—Interrupt Error

1 = Enables an IRQ≈ when the channel encounters an error on source read (CSR BES bit is set), destination write (CSR BED bit is set), or configuration for channel setup (CSR CONF bit is set).

0 = Does not enable an IRQ≈ when the channel encounters an error on source read, destination write, or configuration for channel setup.

ECO—External Control Option

If request generation is programmed to be internal (REQ bits = 00), this bit has no effect.

Single-Address Mode—This bit defines the direction of transfer.

1 = If request generation is programmed to be external (REQ = 1x), the requesting device receives the data (read from memory), and the control signals (DREQ≈, DACK≈, and DONE≈) are used by the requesting device to write data during the source (read) portion of the transfer.

0 = If request generation is programmed to be external (REQ = 1x), the requesting device provides the data (write to memory), and the control signals (DREQ≈, DACK≈, and DONE≈) are used by the requesting device to provide data during the destination (write) portion of the transfer.

MOTOROLAMC68340 USER’S MANUAL6- 27

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 manual CCR1, CCR2

Models: MC68340

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

CCR1, CCR2

MOTOROLAMC68340 USER’S MANUAL6- 27

MC68340 specifications