Opcode Operation, Extb Llegal | Motorola MC68340 guide

Freescale Semiconductor, Inc.

Table 5-2. Instruction Set Summary (Continued)

Freescale Semiconductor, Inc...

Opcode	Operation
CMP2	Compare Rn < lower-bound or
	Rn > upper-bound
	and Set Condition Codes
DBcc	If condition false then (Dn – 1 ⇒ Dn;
	If Dn ≠ –1 then PC + d ⇒ PC)
DIVS	Destination/Source ⇒ Destination
DIVSL
DIVU	Destination/Source ⇒ Destination
DIVUL
EOR	Source ⊕ Destination ⇒ Destination
EORI	Immediate Data ⊕ Destination ⇒ Destination
EORI	Source ⊕ CCR ⇒ CCR
to CCR
EORI	If supervisor state
to SR	the Source ⊕ SR ⇒ SR
	else TRAP
EXG	Rx ⇔ Ry
EXT	Destination Sign-Extended ⇒ Destination
EXTB
LLEGAL	SSP – 2 ⇒ SSP; Vector Offset ⇒ (SSP);
	SSP – 4 ⇒ SSP; PC ⇒ (SSP);
	SSp – 2 ⇒ SSP; SR ⇒ (SSP);
	Illegal Instruction Vector Address ⇒ PC
JMP	Destination Address ⇒ PC
JSR	SP–4 ⇒ SP; PC ⇒ (SP)
	Destination Address ⇒ PC
LEA	〈ea〉 ⇒ An
LINK	SP – 4 ⇒ SP; An ⇒ (SP)
	SP ⇒ An, SP + d ⇒ SP
LPSTOP	If supervisor state
	Immediate Data ⇒ SR
	Interrupt Mask ⇒ External Bus Interface (EBI)
	STOP
	else TRAP
LSL,LSR	Destination Shifted by 〈 count〉 ⇒ Destination
MOVE	Source ⇒ Destination
MOVEA	Source ⇒ Destination
MOVE from	CCR ⇒ Destination
CCR

Syntax

CMP2 〈 ea〉,Rn

DBcc Dn,〈 label〉
DIVS.W 〈 ea〉,Dn	32/16 ⇒ 16r:16q
DIVS.L 〈 ea〉,Dq	32/32 ⇒ 32q
DIVS.L 〈 ea〉,Dr:Dq	64/32 ⇒ 32r:32q
DIVSL.L 〈 ea〉,Dr:Dq	32/32 ⇒ 32r:32q
DIVU.W 〈ea〉,Dn	32/16 ⇒ 16r:16q
DIVU.L 〈ea〉,Dq	32/32 ⇒ 32q
DIVU.L 〈ea〉,Dr:Dq	64/32 ⇒ 32r:32q
DIVUL.L 〈ea〉,Dr:Dq	32/32 ⇒ 32r:32q
EOR Dn,〈 ea〉
EORI # 〈data 〉,〈ea〉
EORI # 〈data 〉,CCR
EORI # 〈data 〉,SR
EXG Dx,Dy
EXG Ax,Ay
EXG Dx,Ay
EXG Ay,Dx

EXT.W Dn	extend byte to word
EXT.L Dn	extend word to long word
EXTB.L Dn	extend byte to long word
ILLEGAL

JMP 〈 ea〉

JSR 〈ea〉

LEA 〈ea〉,An

LINK An,#〈 displacement〉

LPSTOP #〈 data〉

LSd1 Dx,Dy

LSd1 # 〈data 〉,Dy

LSd1 〈ea〉

MOVE 〈 ea〉,〈ea〉

MOVEA 〈 ea〉,An

MOVE CCR, 〈ea〉

MOTOROLAMC68340 USER’S MANUAL5- 17

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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 Opcode Operation, Extb Llegal

Models: MC68340

Freescale Semiconductor, Inc.

Table 5-2. Instruction Set Summary (Continued)

Freescale Semiconductor, Inc...

Opcode

Operation

EXTB

LLEGAL

MC68340 specifications