LSISASX12 LSI, LSISASX12 Datasheet - Page 31

• Manufacturer Part Number: LSISASX12
• Manufacturer: LSI

Specifications of LSISASX12

• Lead Free Status / Rohs Status: Not Compliant

2.1.6
2.1.7
2.2
Routing
Clock/Reset/Misc/JTAG
Serial Debugger
The module contains 12 timers, one for each of the 12 phys. If the
number of timers currently running is less than Spin Number, the spin-up
controller grants a spin-up acknowledgement and then starts the
associated timer. If the number of timers currently running is greater than
or equal to the Spin Number, the spin-up controller does not grant any
more spin-up acknowledgements until one or more of the currently
running timers reaches the Spin-up Delay. The spin-up controller uses
round-robin arbitration.
The spin-up timers use a 1 ms clock, are 14 bits wide, and can time from
2 ms to 16.4 seconds, in 1 ms increments. The number of timers that
are allowed to run simultaneously (Spin Number) is programmable from
zero to 12. A setting of zero results in no spin-up acknowledgement
being granted, and setting of 12 results in every spin-up request being
immediately acknowledged. The
spin-up controller.
The LSISASx12 uses the Spin Mode parameter to provide special
spin-up support for phys that are connected to SATA drives. The
Immediate mode allows OOB to occur with the drive as soon as both
phys are ready. The Host-Notify mode holds OOB until a host in the
domain issues a link reset to the expander phy. The Self-Timed mode
holds OOB until Spin Number and Spin Delay parameters permit the
drive to spin-up.
This block includes the required logic for testing, clock generation, and
reset generation.
This block contains the serial debugger functionality. The serial debugger
includes a UART interface that is used for debugging the chip. The UART
supports 19.2 Kbaud transfers.
The LSISASx12 supports direct routing, table routing, and subtractive
routing. The individual routing method is configurable on a per-phy basis.
Routing
Copyright © 2004, 2005 by LSI Logic Corporation. All rights reserved.
Spin-up Control
register configures the
2-9