Freescale Semiconductor, Inc.

SECTION 2

SIGNAL DESCRIPTIONS

This section contains brief descriptions of the MC68340 input and output signals in their functional groups as shown in Figure 2-1.

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A31/PORT A7/IACK7

 

 

 

A30/PORT A6/IACK6

 

 

 

A29/PORT A5/IACK5

 

 

 

A28/PORT A4/IACK4

PORT A

 

 

A27/PORT A3/IACK3

 

 

 

 

 

A26/PORT A2/IACK2

 

 

 

A25/PORT A1/IACK1

 

TCK TMS TDI

TDO

A24/PORT A0

 

A23–A0

 

TEST

 

D15–D0

 

 

 

FC3–FC0

 

 

 

RESET

 

 

 

BERR

EXTERNAL

 

 

HALT

 

 

BUS

 

 

AS

 

 

INTERFACE

SYSTEM

 

DS

 

 

INTEGRATION

R/W

 

 

MODULE

 

SIZ1

 

 

 

 

 

SIZ0

 

 

 

DSACK1

 

 

 

DSACK0

 

 

 

BR

BUS

 

 

BG

 

 

BGACK

ARBITRATION

 

 

RMC

 

CLOCK

 

 

 

 

BKPT/DSCLK

FREEZE

 

IPIPE/DSO

 

IFETCH/DSI

 

 

 

 

CPU32

CORE

IMB

SCLK

X2 X1

 

 

 

 

 

 

 

 

 

 

RxDA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TWO-CHANNEL

 

 

 

 

 

 

TxDA

 

 

 

 

 

 

 

 

 

 

CTSA

SERIAL

 

 

 

 

 

 

 

 

 

 

 

 

RxDB

 

 

 

 

 

 

I/O

 

 

 

 

 

 

TxDB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CTSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TxRDYA/OP6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUTPUT

 

 

 

RxRDYA/FFULLA/OP4

 

 

 

 

 

 

 

 

PORT

 

 

 

 

 

 

 

 

 

 

 

 

 

RTSB/OP1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RTSA/OP0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EXTAL

XTAL

CLKOUT XFC

 

 

IRQ7/PORT B7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IRQ6/PORT B6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IRQ5/PORT B5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IRQ3/PORT B3

 

 

 

 

 

 

PORT B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CS3/IRQ4/PORT B4

 

 

 

 

 

 

 

CS2/IRQ2/PORT B2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CS1/IRQ1/PORT B1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CS0/AVEC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODCK/PORT B0

 

 

 

 

 

 

 

 

 

 

 

TWO-CHANNEL

TIMER

TIMER

DMA

MODULE

MODULE

CONTROLLER

 

 

DREQ1

DACK1

DONE1

 

DREQ2

 

DACK2

 

DONE2

TGATE1

TIN1 TOUT1

TGATE2

TIN2

TOUT2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 2-1. Functional Signal Groups

MOTOROLAMC68340 USER’S MANUAL2- 1

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Motorola MC68340 manual Section Signal Descriptions
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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.
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