The T90 Read Channel IP, developed by ST, supports data rates ranging from
300 Mbit/s up to 1.7 Gbit/s, and along with the SATA performance confirms the
positioning of this design as an optimized solution for the 2.5-inch and
3.5-inch disk drives used in high-end mobile, desktop computers and
servers.
Read Channels encode and decode the data flowing between the head
preamplifiers and the SATA interface and memory, demanding advanced
mixed-signal technologies, in which ST has extensive design and processing
experience. This 90nm design is based on ST’s successful Tintoretto read-write
channel architecture, which enables high data rates while low power dissipation
in all HDD operating modes. T90 supports 10-bit high-rate codes and Reverse
Order Coding, Media Noise Optimized Data Detection, Advanced Defect Scan,
Longitudinal and Perpendicular recording and Self Servo Write. ST’s 90nm
roadmap of firmware-compatible read channels will address the requirements of
disk drives at all performance levels for consumer and computing application,
with parts available later in the year.
The embedded hard disk controller (HDC), which manages the data flow and
controls head positioning during track and seek operations, is based on proven
ARM-based technology and features a 32-bit high-performance CPU core running at
450MHz.
ST announced the successful fabrication of the MiPHY (Multi-Interface PHY)
Physical Layer in 90nm, last year. This macro-cell provides the high-speed SATA
interface in the new chip, and can also support applications using the Serial
Attached SCSI (SAS), Fiber Channel, and PCI Express serial interface standards,
enabling fast design validation for different markets and reducing costs for
manufacturers by optimizing engineering resources. The SATA interface is
capable of 3 Gbit/s, and has shown exceptional jitter performance of less than
2ps (random) and less than 50ps (total).
“In-house development of the IP for all the functions of the hard-disk drive
system-on-chip places ST in the best position to satisfy the specific
requirements of high-performance drive manufacturers,” said Roberto Fantechi,
General Manager of ST’s Data Storage Division. “Now, with the first 90nm SoC to
reach the market, we can offer our customers increased functionality in the
same silicon space, as a result of the higher gate density, coupled with lower
power requirement and cost.”
