QSGMII Specification: EDCS-540123 Revision 1.2
2 of 19 September 18, 2007
Change History
Definitions
MII – Media Independent Interface: A digital interface that provides a 4-bit wide datapath
between a 10/100 Mbit/s PHY and a MAC sublayer. Since MII is a subset of GMII, in this
document, we will use the term “GMII” to cover all of the specification regarding the MII
interface.
GMII – Gigabit Media Independent Interface: A digital interface that provides an 8-bit wide
datapath between a 1000 Mbit/s PHY and a MAC sublayer. It also supports the 4-bit wide MII
interface as defined in the IEEE 802.3z specification. In this document, the term “GMII”
covers all 10/100/1000 Mbit/s interface operations.
SGMII – Serial Gigabit Media Independent Interface: A digital interface that provides a 1.25
Gbps serial dual-data-rate datapath between a 1000 Mbit/s PHY and a MAC sublayer. Refer to
ENG-46158 or ftp://ftp-eng.cisco.com/smii/smii.html for details.
Revision Date Description Author
1.2 Spetember 7,2007 Updated Bit[13] and Bit[0] on Table3
and added a statement of possible
removal of the first byte of frame in 10/
100Mbit/s operation to match SGMII
spec.
Akin Koyuncuoglu
1.1 June 20, 2007 Reword Note1, Added a requirement to
disable running disparity check at
receiver.
Akin Koyuncuoglu
1.0 April 17, 2007 Updated Interconnect Loss Template-
Figure 11 and Channel Loss Budget-
Table 9. Updated Differential and com
-
mon mode return loss parameters and
differential voltage values in electrical
section.
Akin Koyuncuoglu,
Warren Meggitt
0.5 January 4, 2007 Updated PCS Receive for carrier_detect
function. Updated /I/ Idle Code Group
Selection for Transmission. Added a note
for running disparity support by Framers.
Updated Figure2, Figure4,
Figure5,Figure6, Table1 and Table2
Akin Koyuncuoglu
0.4 December 4, 2006 Updated legal section in the end of the
document
Akin Koyuncuoglu
0.3 September 1, 2006 Updated Electrical Specification Akin Koyuncuoglu,
Warren Meggitt
0.2 Nov. 3, 2005 Initial Release Jeff Provost
