Interface

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 MHM2100AT, MHM200AT manual Ultra DMA data out commands, Initiating an Ultra DMA data out burst, Data out transfer
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MHM215OAT, MHM200AT, MHL2300AT, MHM2100AT specifications

Fujitsu, a leader in storage technology, has developed a range of hard disk drives designed for reliability and performance, catering to both enterprise and consumer needs. The Fujitsu MHM2100AT, MHL2300AT, MHM200AT, and MHM215OAT models are part of this impressive lineup, showcasing various features and technologies that set them apart.

The MHM2100AT model is known for its 2.5-inch form factor, offering a storage capacity of 100GB. It operates at a speed of 5400 RPM, which balances performance and power efficiency. The drive utilizes ATA-6 interface (Parallel ATA) ensuring compatibility with a wide range of systems. One of its primary features is the advanced cache memory architecture, which allows for quicker access to frequently used data. This enhances overall system performance while preserving energy consumption.

The MHL2300AT provides a step up, with its 300GB of capacity. It also maintains a 5400 RPM speed and is designed for optimal heat dissipation and durability. This model is particularly suited for mobile computing applications due to its lightweight design and low power requirements. The MHL2300AT also integrates a sophisticated error correction code (ECC) technology, enhancing data integrity during storage and retrieval processes.

Moving on to the MHM200AT, this unit provides substantial storage of 200GB, maintaining a similar 5400 RPM speed. What sets the MHM200AT apart is its focus on data security with Built-in Security Features such as disk encryption capabilities. This model is suitable for professionals dealing with sensitive information, ensuring both performance and protection against data breaches.

Lastly, the MHM215OAT, another key model, balances user-friendly design with performance metrics. It offers a generous 150GB capacity and features an enhanced seek time for quick file access. With its emphasis on reliability, the MHM215OAT is often utilized in environments where uptime is critical, such as in commercial servers or high-performance workstations.

In conclusion, Fujitsu's MHM2100AT, MHL2300AT, MHM200AT, and MHM215OAT each possess unique features and technologies that cater to diverse user needs. Their combination of efficient power consumption, enhanced data integrity, and reliability make them compelling choices for businesses and individuals alike. Whether for mobile devices, personal computing, or enterprise applications, these models continue to exemplify Fujitsu's commitment to quality and performance in storage solutions.
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