Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Pin Assignment Register 1, 4-15, 4-33, 4-37

Read-Modify-Write Signal, 2-8, 3-19–3-21, 3-40,

Pin Assignment Register 2, 4-15, 4-34, 4-37

3-42–3-43, 3-45

 

Pins

 

Read/Write Signal, 2-7, 3-2

 

Functions, 4-15

 

Real-Time Clock, 4-9

 

Assignment Encoding, 4-15, 4-34

 

Receive Data Signal, 2-11

 

Port B

 

Received Break, 7-11, 7-24, 7-33

 

Configuration, 4-5, 4-16

 

Receiver, 7-9, 7-11

 

Data Direction Register, 4-35

 

Baud Rates, 7-26

 

Data Register, 4-35

 

Buffer, 7-11–7-12, 7-25, 7-30

 

Functions, 4-16

 

Disable Command, 7-30

 

Pin Assignment Register, 4-16, 4-35, 4-37

Enable Command, 7-30

 

Pins

 

FIFO, 7-12–7-13, 7-17, 7-22–7-23, 7-25, 7-33–7-34

Functions, 2-6, 2-9, 4-16

 

Holding Registers, 7-9, 7-11

 

Pin Assignment Encoding, 4-16, 4-35

Ready Signal, 2-12

 

Port Size, 4-14, 6-31

 

Shift Register, 7-9, 7-12

 

Port Width, 3-1, 3-7

 

Timing, 7-12

 

POT Bits, 8-22, 8-28

 

Register

 

Power Considerations, 11-2

 

Field, 5-74

 

Power Consumption, 1-8–1-9, 10-11

 

Indirect Addressing Mode, 5-5

 

Power Dissipation, 10-11

 

Released Write, 5-57

 

Prefetch Controller, 5-90–5-91

 

Remote Loopback Mode, 7-14, 7-38

 

Prefetch Faults, 5-55–5-58, 5-62

 

REQ Bits, 6-27, 6-29, 6-37

 

Preload Register 1, 8-6–8-13, 8-25–8-27

Request to Send Signal, 2-11

 

Preload Register 2, 8-10–8-11, 8-13, 8-26–8-27

Reset

 

Privilege Violations, 5-48

 

Break-Change Interrupt, 7-28

 

Processor Clock Circuitry, 10-1–10-2

 

Effect on DMA Transfers, 6-20

 

Program Control Instructions, 5-26–5-27

Error Status Command, 7-28

 

Program Counter, 5-6, 5-67–5-68

 

Exception, 5-43–5-44

 

Programming Model

 

Instruction, 5-85

 

CPU32, 5-8–5-9

 

Peripherals Command, 5-85–5-86

 

DMA, 6-23

 

Operation, 3-45, 3-46

 

Serial, 7-19

 

Receiver Command, 7-28

 

SIM40, 4-19

 

Signal, 2-8, 3-45–3-48, 5-66

 

Timer, 8-18

 

Status Register, 4-3, 4-23

 

Propagation Delays, 10-7

 

Types, 3-45

 

PS Bits, 4-14, 4-32

 

Timing, 3-47

 

PT Bit, 7-23, 7-47

 

Transmitter Command, 7-28

 

PTP Bit, 4-7, 4-27, 4-37

 

Values for Counter and Prescaler, 8-2

Pulse-Width Measurement, 8-12–8-13

 

Vector, 5-4

 

Pulse-Width Modulation, 8-6–8-7

 

RESET Signal, 3-45–3-48, 5-43

 

 

 

Retry Bus Cycle Operation, 3-32, 3-34–3-35

— R —

 

Timing, 3-37

 

 

Timing, Late Retry, 3-38

 

R/F Bit, 7-22, 7-47

 

Return From Exception, 5-51–5-52

 

 

Return Program Counter, 5-67–5-68

 

R/W Field, 5-73

 

Returning From Background Mode, 5-68

RB Bit, 7-13, 7-24, 7-30

 

RM Bit, 5-53

 

RC Bits, 7-30

 

ROM Interface, 10-3

 

RCS Bits, 7-26

 

RR Bit, 5-53

 

Read

 

RS-232 Interface, 10-4–10-5

 

A/D Register Command, 5-76–5-77

 

RSTEN Bit, 4-29

 

Cycle Word Read, Flowchart, 3-16

 

RTE Instruction, 5-57–5-59, 5-61

 

Memory Location Command, 5-79–5-80

RTS Operation, 7-11, 7-22

 

Modify Write Cycle, 5-53

 

RTSA Signal, 7-6, 7-37

 

Modify Write Faults, 5-55–5-56, 5-58

 

RTSB Signal, 7-6, 7-36

 

System Register Command, 5-67, 5-77–5-78

RTSSignal, 7-11, 7-13, 7-22, 7-29, 7-38

Read-Modify-Write Cycle Timing, 3-19

 

RW Bit, 5-54

 

Retry Operation, 3-36

 

 

 

RxDx Signal, 7-6, 7-11, 7-14, 7-24

 

Interruption, 3-36, 3-43

 

 

 

RxRDA Bit, 7-11, 7-13, 7-15, 7-24, 7-25

Operation, 3-4

 

 

RxRDYA Bit, 7-34–7-35

 

 

 

 

Index-6

MC68340

USER’S MANUAL

MOTOROLA

For More Information On This Product,

 

 

Go to: www.freescale.com

 

Page 438
Image 438
Motorola MC68340 manual Freescale Semiconductor, Inc

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.