Samsung 3.5" hard disk drives Manuel D’Utilisation

DISK DRIVE OPERATION 
 

SpinPoint V40 Product Manual

 

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SpinPoint V40 drives attain their intelligence and performance through the specialized electronic components 
mounted on the PCBA. The components are mounted on one side of the PCBA. 
 
The Preamplifier IC is the only electrical component that is not on the PCBA.  It is mounted on the flexible 
circuit inside the HDA.  Locating the Preamplifier IC as close as possible to the read/write heads via surface 
mount technology improves the signal to noise ratio. 
 

 
The DSP core controller incorporates a true 16-bit digital signal processor (DSP), a bus controller unit(BCU), 
an interrupt controller unit(ICU), a general purpose timer(GPT), and a 8K word SRAM. 
 

 
The AT disk controller works in conjunction with the DSP core to perform the ATA interface control, buffer 
data flow management, disk format/read/write control, and error correction functions of an embedded disk 
drive controller.  The DSP communicates with the disk controller module by reading from and writing to its 
various internal registers. 
 
To the DSP core, the registers of the disk controller appear as unique memory or I/O locations that are 
randomly accessed and operated upon.  By reading from and writing to the registers, the DSP core initiates 
operations and examines the status of the different functional blocks.  Once an operation is started, successful 
completion or an error condition may cause the disk controller to interrupt the DSP core, which then 
examines the status registers of the disk controller and determines an appropriate course of action. The local 
DSP core may also poll the device to ascertain successful completion or error conditions. 
 
Figure 5-2 illustrates the relationships between the various blocks within the AT disk controller.  These 
blocks will be referred to throughout this document.