Interface

HSTROBE edge no more frequently than tCYC for the selected Ultra DMA Mode. The host shall not generate two rising or falling HSTROBE edges more frequently than 2 tCYC for the selected Ultra DMA mode.

3)The host shall not change the state of DD (15:0) until at least tDVH after generating an HSTROBE edge to latch the data.

4)The host shall repeat steps (1), (2) and (3) until the data transfer is complete or an Ultra DMA burst is paused, whichever occurs first.

5.5.4.3Pausing an Ultra DMA data out burst

The following steps shall occur in the order they are listed unless otherwise specifically allowed (see 5.6.4.9 and 5.6.4.2 for specific timing requirements).

a)Host pausing an Ultra DMA data out burst

1)The host shall not pause an Ultra DMA burst until at least one data word of an Ultra DMA burst has been transferred.

2)The host shall pause an Ultra DMA burst by not generating an HSTROBE edge.

Note: The device shall not immediately negate DMARQ to initiate Ultra DMA burst termination when the host stops generating HSTROBE edges. If the host does not assert STOP, in order to initiate Ultra DMA

burst termination, the device shall negate DDMARDY- and wait tRP before negating DMARQ.

3)The host shall resume an Ultra DMA burst by generating an HSTROBE edge.

b)Device pausing an Ultra DMA data out burst

1)The device shall not pause an Ultra DMA burst until at least one data word of an Ultra DMA burst has been transferred.

2)The device shall pause an Ultra DMA burst by negating DDMARDY-.

3)The host shall stop generating HSTROBE edges within tRFS of the device negating DDMARDY-.

4)If the device negates DDMARDY- within tSR after the host has generated an HSTROBE edge, then the device shall be prepared to receive zero or one additional data words. If the device negates DDMARDY- greater

than tSR after the host has generated an HSTROBE edge, then the device shall be prepared to receive zero, one or two additional data words. The

additional data words are a result of cable round trip delay and tRFS timing for the host.

5)The device shall resume an Ultra DMA burst by asserting DDMARDY-.

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Fujitsu MHD2021AT, MHC2032AT, MHC2040AT, MHD2032AT manual Pausing an Ultra DMA data out burst
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MHC2040AT, MHC2032AT, MHD2032AT, MHD2021AT specifications

Fujitsu offers a range of advanced hard disk drives (HDD) designed for various computing needs, including the MHD2021AT, MHD2032AT, MHC2032AT, and MHC2040AT models. These drives combine reliable performance, capacity options, and technological features aimed at enhancing data storage efficiency.

The Fujitsu MHD2021AT is known for its capacity of 20 GB, making it an excellent choice for users requiring a compact and efficient HDD. With a spindle speed of 5400 RPM, it balances speed and power consumption, catering to mobile computing and lower power devices. Its ATA interface ensures compatibility with a wide range of systems, making it a versatile option for various applications.

The MHD2032AT model offers a slightly higher capacity of 30 GB, maintaining similar technological attributes to its predecessor. With an enhanced data transfer rate, it allows for quicker access to stored files, perfect for users handling larger volumes of data. The robust error correction features in this model further ensure data integrity, making it a reliable choice for demanding environments.

For users needing more robust storage solutions, the MHC2032AT steps it up with features tailored for performance-heavy applications. Its 30 GB capacity is suited for desktop and workstation environments that require swift data retrieval and significant storage. The drive employs advanced caching techniques, which boost performance further by optimizing read and write operations, ensuring smoother multitasking capabilities.

The MHC2040AT is the flagship model in this line, providing an impressive storage capacity of 40 GB. This HDD is designed for high-performance applications where speed is crucial. The drive’s increased spindle speed and superior data transfer rates make it ideal for video editing, gaming, and large database management. Alongside its enhanced performance features, it includes advanced thermal management technology that maintains optimal operational temperatures, prolonging the drive's lifespan.

All four models leverage Fujitsu's commitment to data reliability, featuring robust shock resistance and low noise levels. Collectively, these drives cater to a spectrum of user needs, from compact data storage to high-capacity solutions, maintaining Fujitsu's reputation for quality and innovation in the storage market.
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