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Fujitsu MHV2080AH, MHV2100AH, MHV2060AH, MHV2040AH manual Host Commands, Command code and parameters

Models: MHV2040AH MHV2080AH MHV2060AH MHV2100AH

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Interface

(2) Device Control register (X’3F6’)

The Device Control register contains device interrupt and software reset.

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit

0

 

 

 

 

 

 

 

 

 

HOB

X

X

X

X

SRST

nIEN

0

 

 

 

 

 

 

 

 

 

 

-Bit 7: High Order Byte (HOB) is the selector bit that selects higher-order information or lower-order information of the EXT system command.

If HOB = 1, LBA bits 47 to 24 and the higher-order 8 bits of the sector count are displayed in the task register.

If HOB = 0, LBA bits 23 to 0 and the lower-order 8 bits of the sector count are displayed in the task register.

-Bit 2: Software Reset (SRST) is the host software reset bit. When this bit is set, the device is held reset state. When two devices are daisy chained on the interface, setting this bit resets both devices simultaneously.

The slave device is not required to execute the DASP- handshake.

-Bit 1: nIEN bit enables an interrupt (INTRQ signal) from the device to the host. When this bit is 0 and the device is selected, an interruption (INTRQ signal) can be enabled through a tri-state buffer. When this bit is 1 or the device is not selected, the INTRQ signal is in the high- impedance state.

5.3Host Commands

The host system issues a command to the device by writing necessary parameters in related registers in the command block and writing a command code in the Command register.

The device can accept the command when the BSY bit is 0 (the device is not in the busy status).

The host system can halt the uncompleted command execution only at execution of hardware or software reset.

When the BSY bit is 1 or the DRQ bit is 1 (the device is requesting the data transfer) and the host system writes to the command register, the correct device operation is not guaranteed.

5.3.1 Command code and parameters

Table 5.3 lists the supported commands, command code and the registers that needed parameters are written.

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Fujitsu MHV2080AH, MHV2100AH, MHV2060AH, MHV2040AH manual Host Commands, Command code and parameters
Page 89 Page 91

MHV2040AH, MHV2080AH, MHV2060AH, MHV2100AH specifications

The Fujitsu MHV series of hard disk drives, specifically the MHV2060AH, MHV2080AH, MHV2100AH, and MHV2040AH, are renowned for their reliability and performance in the mobile HDD segment. Designed primarily for use in laptops and other portable devices, these drives integrate cutting-edge technologies to meet the demands of today's data-intensive applications.

One of the hallmark features of the MHV series is its high data density, allowing for substantial storage capabilities in compact sizes. The MHV2060AH offers a storage capacity of 60 GB, while the MHV2080AH and MHV2100AH offer 80 GB and 100 GB respectively. The MHV2040AH provides a slightly more modest but still robust 40 GB of storage. This range of capacities ensures that users can select the model that best fits their storage needs.

The drives utilize the latest perpendicular magnetic recording (PMR) technology, which enhances recording efficiency and increases data storage densities. This technology significantly optimizes the use of disk surface area, providing better performance and more reliable data access. Additionally, the MHV series incorporates an advanced actuator system that ensures precision head positioning, enhancing data integrity and reducing error rates during read and write operations.

In terms of performance, the MHV series maintains a revolutions per minute (RPM) rating of 5400, which strikes a balance between speed and energy efficiency, making these drives suitable for low-power applications. The drives are also designed with a low acoustic level, generating minimal noise during operation—a crucial factor for mobile users who prefer quieter devices.

Furthermore, the Fujitsu MHV series features a robust shock resistance design, allowing them to withstand the rigors of mobile computing. This makes them suitable for use in portable environments subject to vibration and physical movement, thus ensuring data security and drive longevity.

Overall, the Fujitsu MHV2060AH, MHV2080AH, MHV2100AH, and MHV2040AH represent a formidable selection of mobile hard disk drives filled with advanced technologies and features, making them well-suited for a wide range of applications in today's fast-paced digital world. With their combination of storage capacity, performance, and durability, these drives continue to serve as reliable solutions for users seeking efficient data storage in portable formats.