Freescale Semiconductor, Inc.

11.7 AC TIMING SPECIFICATIONS (Continued)

 

 

 

3.3 V or

 

 

 

 

3.3 V

5.0 V

5.0 V

 

 

 

8.39 MHz

16.78 MHz

25.16 MHz

 

Num.

Characteristic

Symbol Min Max

Min Max

Min Max

Unit

Freescale Semiconductor, Inc...

304

CLKOUT Low to Data-In Invalid (Fast

tCLDI

 

Termination Hold)

 

30A4

CLKOUT Low to Data-In High Impendance

tCLDH

315

DSACKAsserted to Data-In Valid

tDADI

31A

DSACKAsserted to DSACKValid (Skew)

tDADV

32

HALT and RESET Input Transition Time

tHRrf

33

CLKOUT Low to BG Asserted

tCLBA

34

CLKOUT Low to BG Negated

tCLBN

356

BR Asserted to BG Asserted (RMC Not

tBRAGA

 

Asserted)

 

37

BGACK Asserted to BG Negated

tGAGN

39

BG Width Negated

tGH

39A

BG Width Asserted

tGA

46

R/ W Width Asserted (Write or Read)

tRWA

46A

R/ W Width Asserted (Fast Termination Write or

tRWAS

 

Read)

 

47A8

Asynchronous Input Setup Time

tAIST

47B

Asynchronous Input Hold Time

tAIHT

485,7

DSACKAsserted to BERR, HALT Asserted

tDABA

53

Data-Out Hold from CLKOUT High

tDOCH

54

CLKOUT High to Data-Out High Impedance

tCHDH

55

R/ W Asserted to Data Bus Impedance Change

tRADC

56

RESET Pulse Width (Reset Instruction)

tHRPW

56A

RESET Pulse Width (Input from External

tRPWI

 

Device)

 

57

BERR Negated to HALT Negated (Rerun)

tBNHN

70

CLKOUT Low to Data Bus Driven (Show Cycle)

tSCLDD

71

Data Setup Time to CLKOUT Low (Show

tSCLDS

 

Cycle)

 

72

Data Hold from CLKOUT Low (Show Cycle)

tSCLDH

80

DSI Input Setup Time

tDSISU

81

DSI Input Hold Time

tDSIH

82

DSCLK Setup Time

tDSCSU

83

DSCLK Hold Time

tDSCH

84

DSO Delay Time

tDSOD

30

15

10

ns

180

90

60

ns

100

50

32

ns

60

30

20

ns

400

200

140

ns

60

30

20

ns

60

30

20

ns

1

1

1

CLKOUT

1

2.5

1

2.5

1

2.5

CLKOUT

2

2

2

CLKOUT

1

1

1

CLKOUT

300

150

100

ns

180

90

60

ns

15

8, 5

5

ns

30

15

10

ns

60

30

20

ns

0

0

0

ns

60

30

20

ns

80

40

25

ns

512

512

512

— CLKOUT

590

590

590

CLKOUT

0

0

0

ns

0

60

0

30

0

20

ns

30

15

10

ns

20

10

6

ns

30

15

10

ns

20

10

6

ns

30

15

10

ns

20

10

6

ns

tcyc

tcyc

tcyc

ns

 

+ 50

 

+ 25

 

+ 16

 

MOTOROLAMC68340 USER’S MANUAL11-9

For More Information On This Product,

Go to: www.freescale.com

Page 409
Image 409
Motorola MC68340 manual Freescale Semiconductor, Inc AC Timing Specifications, MHz Num Characteristic Symbol Min Max Unit

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.