Interface

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.

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Fujitsu MHD2032AT, MHC2032AT, MHD2021AT, MHC2040AT manual Ultra DMA data in commands, Initiating an Ultra DMA data in 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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