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Fujitsu MHC2032AT, MHD2021AT Ultra DMA data out commands, Initiating an Ultra DMA data out burst

Models: MHC2040AT MHC2032AT MHD2032AT MHD2021AT

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5.5 Ultra DMA Feature Set

5.5.4 Ultra DMA data out commands

5.5.4.1 Initiating an Ultra DMA data out burst

The following steps shall occur in the order they are listed unless otherwise specifically allowed (see 5.6.4.7 and 5.6.4.2 for specific timing requirements):

1)The host shall keep DMACK- in the negated state before an Ultra DMA burst is initiated.

2)The device shall assert DMARQ to initiate an Ultra DMA burst.

3)Steps (3), (4), and (5) may occur in any order or at the same time. The host shall assert STOP.

4)The host shall assert HSTROBE.

5)The host shall negate CS0-, CS1-, DA2, DA1, and DA0. The host shall keep CS0-, CS1-, DA2, DA1, and DA0 negated until after negating DMACK- at the end of the burst.

6)Steps (3), (4), and (5) shall have occurred at least tACK before the host asserts DMACK-. The host shall keep DMACK- asserted until the end of an Ultra DMA burst.

7)The device may negate DDMARDY- tZIORDY after the host has asserted DMACK-. Once the device has negated DDMARDY-, the device shall not release DDMARDY- until after the host has negated DMACK- at the end of an Ultra DMA burst.

8)The host shall negate STOP within tENV after asserting DMACK-. The host shall not assert STOP until after the first negation of HSTROBE.

9)The device shall assert DDMARDY- within tLI after the host has negated STOP. After asserting DMARQ and DDMARDY- the device shall not negate either signal until after the first negation of HSTROBE by the host.

10)The host shall drive the first word of the data transfer onto DD (15:0). This step may occur any time during Ultra DMA burst initiation.

11)To transfer the first word of data: the host shall negate HSTROBE no sooner

than tLI after the device has asserted DDMARDY-. The host shall negate HSTROBE no sooner than tDVS after the driving the first word of data onto DD (15:0).

5.5.4.2 The data out transfer

The following steps shall occur in the order they are listed unless otherwise specifically allowed (see 5.6.4.8 and 5.6.4.2 for specific timing requirements):

1)The host shall drive a data word onto DD (15:0).

2)The host shall generate an HSTROBE edge to latch the new word no sooner than tDVS after changing the state of DD (15:0). The host shall generate an

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Fujitsu MHC2032AT, MHD2021AT manual Ultra DMA data out commands, Initiating an Ultra DMA data out burst, Data out transfer
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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.