Interface

[Signal]

[I/O]

[Description]

DMARQ

O

This signal is used for DMA transfer between the host system and

 

 

the device. The device asserts this signal when the device

 

 

completes the preparation of DMA data transfer to the host

 

 

system (at reading) or from the host system (at writing).

 

 

The direction of data transfer is controlled by the DIOR and

 

 

DIOW signals. This signal hand shakes with the DMACK-signal.

 

 

In other words, the device negates the DMARQ signal after the

 

 

host system asserts the DMACK signal. When there is other data

 

 

to be transferred, the device asserts the DMARQ signal again.

 

 

When the DMA data transfer is performed, IOCS16-, CS0- and

 

 

CS1- signals are not asserted. The DMA data transfer is a 16-bit

 

 

data transfer.

+5 VDC

I

+5 VDC power supplying to the device.

GND

-

Grounded signal at each signal wire.

Note:

 

 

“I” indicates input signal from the host to the device.

“O” indicates output signal from the device to the host.

“I/O” indicates common output or bi-directional signal between the host and the device.

5.2 Logical Interface

The device can operate for command execution in either address-specified mode; cylinder-head-sector (CHS) or Logical block address (LBA) mode. The IDENTIFY DEVICE information indicates whether the device supports the LBA mode. When the host system specifies the LBA mode by setting bit 6 in the Device/Head register to 1, HS3 to HS0 bits of the Device/Head register indicates the head No. under the LBA mode, and all bits of the Cylinder High, Cylinder Low, and Sector Number registers are LBA bits.

The sector No. under the LBA mode proceeds in the ascending order with the start point of LBA0 (defined as follows).

LBA0 = [Cylinder 0, Head 0, Sector 1]

Even if the host system changes the assignment of the CHS mode by the INITIALIZE DEVICE PARAMETER command, the sector LBA address is not changed.

LBA = [((Cylinder No.) ⋅ (Number of head) + (Head No.)) ⋅ (Number of sector/track)] + (Sector No.) − 1

5-6

C141-E221

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Fujitsu MHV2060AS, MHV2080AS, MHV2040AS manual Logical Interface, Dmarq
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MHV2060AS, MHV2080AS, MHV2040AS specifications

Fujitsu's MHV series of hard disk drives, specifically the MHV2040AS, MHV2080AS, and MHV2060AS models, are designed to deliver efficient performance and reliability for a range of applications, particularly in desktop computing and entry-level servers. Each of these drives adheres to the Serial ATA (SATA) interface, which ensures compatibility across a wide range of systems and is known for its cost-effectiveness and simplicity.

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Overall, the Fujitsu MHV2040AS, MHV2080AS, and MHV2060AS hard drives provide a solid solution for users looking for dependable storage with a range of capacities to fit their needs. Their performance, combined with noise reduction technologies and energy efficiency, makes them a notable choice for various computing environments, from single-user desktops to small business applications.
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