5.5 Ultra DMA Feature Set

g)Ultra DMA data in burst

The device should not invert the state of this signal in the period from the moment of STOP signal negation or HDMARDY-signal assertion to the moment of inversion of the first STROBE signal.

5.5.2.2Data transfer phase

a)The Data transfer phase is defined as the period from The Ultra DMA burst initiation phase to Ultra DMA burst termination phase.

b)The receiving side stops the Ultra DMA burst temporarily by negating DMARDY-signal, and then restarts the Ultra DMA burst by asserting again.

c)The transmitting side stops the Ultra DMA burst temporarily by not- performing inversion of STROBE signal, and then restarts the Ultra DMA burst by restarting the inversion.

d)When the transmitting side has stopped the inversion of STROBE signal, the receiving side should not output termination request signal immediately.

The receiving side should negate DMARDY signal when no termination request signal has been received from the transmission side, and then should output the termination request signal when a certain wait time has elapsed.

e)The transmitting side is allowed to send STROBE signal at a transfer speed that is lower than the one in the transferable fastest Ultra DMA mode, but is not allowed to send the STROBE signal at a higher speed than this.

The receiving side should be able to receive the data in the transferable fastest Ultra DMA mode.

5.5.2.3Ultra DMA burst termination phase

a)The transmitting side or receiving side is allowed to end the Ultra DMA burst.

b)The Ultra DMA burst termination is not the end of the command execution. When the Ultra DMA burst termination has occurred before the ending of the command, the command should be ended by starting a new Ultra DMA burst, or the host should issue command abort by outputting hard reset or soft reset to the device.

c)The Ultra DMA burst should be stopped temporarily before the receiving side outputs the ending request.

d)The host outputs the ending request by asserting STOP signal, and then the device negates DMARQ signal to confirm it.

e)The device outputs the ending request by negating DMARQ signal, and then the host asserts STOP signal to confirm it.

C141-E050-02EN

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Fujitsu MHC2040AT, MHC2032AT, MHD2021AT, MHD2032AT manual Data transfer phase, Ultra DMA burst termination phase
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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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