5.5 Ultra DMA Feature Set

f)Once the transmitting side has outputted the ending request, the output state of STROBE signal should not be changed unless the receiving side has confirmed it. Then, if the STROBE signal is not in asserted state, The transmitting side should assert the STROBE signal. However, the assertion of the STROBE signal should not cause the data transfer to occur.

g)The transmitting side should return the STROBE signal to its asserted state immediately after receiving the ending request from the receiving side.

However, the returning of the STROBE signal to its asserted state should not cause the data transfer to occur and CRC to be perform.

h)Once the receiving side has outputted the ending request, the negated state of the DMARDY signal should not be changed for the remaining Ultra DMA burst to be performed.

i)The receiving side should neglect the inversion of the STROBE signal if DMARQ signal has been negated or STOP signal has been asserted.

5.5.3 Ultra DMA data in commands

5.5.3.1 Initiating an Ultra DMA data in burst

The following steps shall occur in the order they are listed unless otherwise specifically allowed (see 5.6.4.1 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. After assertion of DMARQ the device shall not negate DMARQ until after the first negation of DSTROBE.

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 negate HDMARDY-.

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 host shall release DD (15:0) within tAZ after asserting DMACK-.

8)The device may assert DSTROBE tZIORDY after the host has asserted DMACK-. Once the device has driven DSTROBE the device shall not release DSTROBE until after the host has negated DMACK- at the end of an Ultra DMA burst.

9)The host shall negate STOP and assert HDMARDY- within tENV after asserting DMACK-. After negating STOP and asserting HDMARDY-, the

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Fujitsu MHM200AT, MHM2100AT, MHM215OAT, MHL2300AT manual Ultra DMA data in commands, Initiating an Ultra DMA data in burst
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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.

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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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