|
|
【文件名】:091231@52RD_QSGMII.pdf
【格 式】:pdf
【大 小】:199K
【简 介】:
【目 录】:
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.
QSGMII uses two data signals in each direction to convey frame data and link rate information between a multi-port 10/100/1000 PHY and Ethernet MAC. The data signals operate at 5.0Gbps using CDR technology to recover the clock at the MAC and PHY interfaces. Due to the high speed of operation, each of these signal pairs are realized as differential pairs thus optimizing signal integrity while minimizing system noise.
|
评分
-
1
查看全部评分
-
|
52RD网友
发表于 2014-11-7 11:12:30
IP卡
狗仔卡
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
显身卡
悔悟卡
匿名卡