Disk Drive Operation
WA31273A / WA32543A / WA33203A / WA32163A / WA31083A / WA32162A5-5
5-2-1 Integrated AT Interface, Disk Controller, Buffer Manager and
Microprocessor
The Samsung SID-9501 incorporates a high speed 16-bit Fixed Point DSP (PINE Core)
microprocessor to perform the ATA interface control, buffer data flow management, disk format/
read/write control, error correction functions of an embedded disk drive controller, as well as
embedded servo control. It is through the DSP microprocessor that the SID-9501D communicates to
the other control blocks within the device, to the buffer and the disk. The DSP Core provides the
following features:
•
40ns cycle time at 5 Volts
•
16-bit Fixed Point DSP (PINE Core)
•
16 x 16bit 2’s Complement Parallel Multiplier with 32bit Product
•
Single Cycle Multiply and Accumulate
•
36bit ALU with Two 36bit Accumulators
•
Programmable DPLL for DSP clock
•
On-chip Data RAM (256 word x 2)
•
On-chip Program RAM (3K word)
Other Features:
•
5V + 10% Operation
•
Programmable Power-down Modes
•
CMOS 0.65
µ
m Standard-cell technology
•
208 pin QFP package
Figure 5-2-1 reveals the various blocks within the SID-9501 along with their generalized
interconnection. The blocks described in this figure will be referred to throughout this document.
Figure 5-2-1 SID-9501 Block Diagram
Disk
Interface
Host
Interface
DSP
PINE Core
(25 MIPS)
ATA
Interface Block
Embedded
Servo Control
Data Acquisition/
VCM Control
Disk
Control
Block
Buffer
Management
Block
ECC
Block
