Operand Data | Motorola MC68340 specification

Freescale Semiconductor, Inc.

space accessed. Only absolute addressing is supported. Valid data sizes include byte, word, and long word.

Command Format:

15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
0	0	0	1	1	0	0	0	OP SIZE		0	0	0	0	0	0

Command Sequence:

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WRITE (B/W)	MS ADDR	LS ADDR	DATA	WRITE
				MEMORY
???	"NOT READY"	"NOT READY"	"NOT READY"
				LOCATION

	XXX	NEXT CMD
	"ILLEGAL"	"NOT READY"

WRITE (LONG)	MS ADDR	LS ADDR	MS DATA
???	"NOT READY"	"NOT READY"	"NOT READY"
	XXX	NEXT CMD
	"ILLEGAL"	"NOT READY"
			LS DATA	WRITE
			LS DATA	MEMORY
			"NOT READY"	MEMORY
			"NOT READY"	LOCATION
				LOCATION

Operand Data:

XXX

"NOT READY"

NEXTX CMD

"CMD COMPLETE"

XXX

BERR/AERR

NEXT CMD

"NOT READY"

XXX

"NOT READY"

NEXTXXX CMD

"CMD COMPLETE"

XXX

BERR/AERR

NEXT CMD "NOT READY"

Two operands are required for this instruction. The first operand is a long-word absolute address that specifies a location to which the operand data is to be written. The second operand is the data. Byte data is transmitted as a 16-bit word, justified in the least significant byte; 16- and 32-bit operands are transmitted as 16 and 32 bits, respectively.

Result Data:

Successful write operations return a status of $0FFFF. Bus or address errors on the write cycle are indicated by the assertion of bit 16 in the status message and by a data pattern of $0001.

5.6.2.8.10Dump Memory Block (DUMP). DUMP is used in conjunction with the READ command to dump large blocks of memory. An initial READ is executed to set up the

5- 80MC68340 USER’S MANUALMOTOROLA

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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 Operand Data

Models: MC68340

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

MS ADDR

Operand Data:

MC68340 specifications