5.6 Timing

5.6 Timing

5.6.1 PIO data transfer

Figure 5.9 shows of the data transfer timing between the device and the host system.

t0

Addresses

 

t1

t2

 

 

 

 

t9

 

 

 

 

 

DIOR-/DIOW-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Write data

 

 

 

 

 

 

 

 

t2i

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DD0-DD15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t3

 

 

t4

 

 

 

 

 

 

 

 

Read data

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DD0-DD15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t5

 

 

 

 

 

t6

 

 

 

 

 

 

 

 

 

IORDY

t10

 

 

 

 

 

 

t11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Symbol

Timing parameter

 

 

 

 

 

 

 

 

Min.

Max.

 

Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t0

Cycle time

 

 

 

 

 

 

 

120

 

ns

 

t1

Data register selection setup time for DIOR-/DIOW-

 

25

 

ns

 

t2

Pulse width of DIOR-/DIOW-

 

 

 

 

 

 

 

70

 

ns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t2i

Recovery time of DIOR-/DIOW-

 

 

 

 

 

 

 

25

 

ns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t3

Data setup time for DIOW-

 

 

 

 

 

 

 

20

 

ns

 

t4

Data hold time for DIOW-

 

 

 

 

 

 

 

10

 

ns

 

 

 

 

 

 

 

 

 

 

t5

Time from DIOR- assertion to read data available

 

 

50

 

ns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t6

Data hold time for DIOR-

 

 

 

 

 

 

 

5

 

ns

 

t9

Data register selection hold time for DIOR-/DIOW-

 

10

 

ns

 

t10

Time from DIOR-/DIOW- assertion to IORDY "low" level

 

 

35

 

ns

 

 

 

 

 

 

 

 

 

t11

Time from validity of read data to IORDY "high" level

 

0

 

ns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t12

Pulse width of IORDY

 

 

 

 

 

 

 

 

1,250

 

ns

 

Figure 5.9 PIO data transfer timing

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Fujitsu MHW2040AC, MHW2060AC manual Timing, PIO data transfer

MHW2060AC, MHW2040AC specifications

The Fujitsu MHW2040AC and MHW2060AC are notable hard disk drives (HDDs) that have been widely used in various computing applications, especially in laptops and compact devices. These models are part of Fujitsu's commitment to providing reliable storage solutions that meet the demands of modern computing.

The MHW2040AC offers a storage capacity of 40 GB, while the MHW2060AC provides a slightly larger capacity at 60 GB. This range of storage makes both models suitable for users looking for dependable space for documents, multimedia files, and software applications. Both drives utilize a 2.5-inch form factor, ideal for mobile computing, as they are lightweight and designed to fit into space-constrained environments.

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The MHW2040AC and MHW2060AC also incorporate several advanced technologies to bolster their performance and reliability. One such feature is the use of a fluid dynamic bearing (FDB) for the spindle motor, which minimizes noise and vibration, thus improving the overall user experience. Additionally, both drives come with error correction technology that helps maintain data integrity by detecting and correcting errors during read and write operations.

Moreover, these HDDs feature a shock sensor that can detect sudden movements, allowing the drive to park its heads to prevent data loss and hardware damage. This is particularly beneficial in mobile environments where the risks of impact are higher.

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In summary, the Fujitsu MHW2040AC and MHW2060AC are reliable, efficient, and user-friendly hard disk drives that combine moderate capacities with advanced features designed to enhance performance, ensure data integrity, and extend device longevity. These drives are well-suited for a range of applications, making them a solid choice for users seeking dependable storage solutions.