EW31244SL7QV Datasheet, PDF (16/252 Pages) Intel Corporation – Intel® 31244 PCI-X to Serial ATA Controller

Intel^® 31244 PCI-X to Serial ATA Controller
About This Document
1.2
1.2.1
1.2.2
Terminology and Conventions
Representing Numbers
All numbers in this document may be assumed to be Base10, unless designated otherwise. In text,
numbers in Base16 are represented as ‘nnnH’, where the ‘H’ signifies hexadecimal. In pseudo code
descriptions, hexadecimal numbers are represented in the form 0x1234 ABCD. Binary numbers are
not explicitly identified, but are assumed when bit operations or bit ranges are used.
Fields
Reserved:
Read/Write:
Read Only:
Read/Clear:
Read/Set:
Writeonce/Readonly:
Is a field that may be used by an implementation. When the initial value
of a reserved field is supplied by software, this value must be zero.
Software should not modify reserved fields or depend on any values in
reserved fields.
May be written to a new value following initialization. This field may
always be read to return the current value.
May be read to return the current value. Writes to read only fields are
treated as no-op operations and will not change the current value, nor
result in an error condition.
May also be read to return the current value. A write to a read/clear field
with the data value of 0 will cause no change to the field. A write to a
read/clear field with a data value of 1 will cause the field to be cleared
(reset to the value of 0). For example, when a read/clear field has a value
of F0H, and a data value of 55H is written, the resultant field will be
A0H.
May also be read to return the current value. A write to a read/set field
with the data value of 0 will cause no change to the field. A write to a
read/set field with a data value of 1 will cause the field to be set (set to
the value of 1). For example, when a read/set field has a value of F0H,
and a data value of 55H is written, the resultant field will be F5H.
May be written to a new value once following initialization. After the
this write has occurred, the writeonce/readonly field will treat all
subsequent writes as no-op operations and will not change the current
value or result in an error condition. The field may always be read to
return the current value.
16
April 2004
Developer’s Manual