IDT
PES24T3G2 User Manual
4
February 22, 2012
Notes
Use of Hypertext
In Chapter 8, Tables 8.2 and 8.3 contain register names and page numbers highlighted in blue under the
Register Definition column. In pdf files, users can jump from this source table directly to the registers by
clicking on the register name in the source table. Each register name in the table is linked directly to the
appropriate register in the register section of the chapter. To return to the source table after having jumped
to the register section, click on the same register name (in blue) in the register section.
Reference Documents
PCI Express Base Specification, Revision 2.0, PCI Special Interest Group.
PCI Power Management Interface Specification, Revision 1.2, PCI Special Interest Group.
PCI to PCI Bridge Architecture Specification, Revision 1.2, PCI Special Interest Group.
SMBus Specification, Revision 2.0.
Revision History
September 26, 2007: Initial publication of preliminary user manual.
November 28, 2007: Updated Chapter 1 to reflect some pins are not available in the 19x19 pinout
package.
December 4, 2007: Added hardwired address locations for MSMBADDR and SSMBADDR to Chapters
1 and 5.
January 7, 2008: In Chapter 1, Table 1.9, MSMBADDR[4:1] pins changed to pull-down. In Chapter 5, I/
O Expanders section, added text explaining legacy compatibility with Gen1 PCIe switches. In Chapter 8,
modified the following fields: L0SEL in PCIELCAP has default value of 0x6, ARIS in PCIEDCAP2 is RO,
and ARIFEN in PCIEDCTL2 is RO.
July 15, 2008: In Chapter 8. added Autonomous Link Reliability Management section and 4 registers.
Removed General Purpose Register (0x40C).
August 25, 2008: In Chapter 2, deleted reference to FRSTS pins.
Read and Write Clear
RW1C
Software can read and write to registers/bits with this attribute.
However, writing a value of zero to a bit with this attribute has no
effect. A RW1C bit can only be set to a value of 1 by a hardware
event. To clear a RW1C bit (i.e., change its value to zero) a value
of one must be written to the location. An RW1C bit is never
cleared by hardware.
Read and Write when
Unlocked
RWL
Software can read the register/bits with this attribute. Writing to
register/bits with this attribute will only cause the value to be modi-
fied if the REGUNLOCK bit in the SWCTL register is set. When
the REGUNLOCK bit is cleared, writes are ignored and the regis-
ter/bits are effectively read-only.
RWL bits are implicitly “Sitcky.”
Write Transient
WT
The zero is always read from a bit/field of this type. Writing of a
one is used to quality the writing of other bits/fields in the same
register.
Zero
Zero
A zero register or bit must be written with a value of zero and
returns a value of zero when read.
Type
Abbreviation
Description
Table 2 Register Terminology (Sheet 2 of 2)
Содержание 89HPES24T3G2ZBAL
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