GMII没有auto-negotiation么？

CindyQin1 2004-04-08 08:59:52

我在书上看到MII层结构如下：
-------
AP
-------
PROTOCOL
--------
DRIVER
--------
MAC
--------
RS
--------
PCS
--------
PMA
--------
PMD
--------
AUTO-NEGOTIATION
---------
MDI
---------
而gmii就只少了AUTO-NEGOTIATION，AUTO-NEGOTIATION是自适应性，gmii应该也可以有吧？

...全文

53 2 打赏收藏转发到动态举报

写回复

2 条回复

切换为时间正序

请发表友善的回复…

发表回复

fierygnu 2004-04-08

打赏
举报

回复

有自协商。书上讲的很清楚。

CindyQin1 2004-04-08

打赏
举报

回复

当然，mac变为了gmac

Single-Chip 16-Port SerDes Gigabit Switch.The BCM5396 is a 16-port Gigabit Ethernet (GbE) switch integrated with 16 1.25G SerDes/SGMII port interfaces for connecting to external Gigabit PHYs or fiber modules. The BCM5396 provides the lowestcost GbE functionality to the desktop switching solution or WebSmart™ application. The BCM5396 is a highly integrated solution, combining all of the functions of a high-speed switch system, including packet buffer, Media Access Controllers (MACs), address management, and a nonblocking switch controller into a single monolithic 0.13 µm CMOS device. The BCM5396 complies with the IEEE 802.3™, 802.3u, 802.3ab, and 802.3x specifications, including the MAC control PAUSE frame and auto-negotiation subsections, providing compatibility with all industry-standard Ethernet, Fast Ethernet, and GbE devices. The BCM5396 device provides integrated 1.25G SerDes, reducing board footprint requirements. The 16 ports have SGMII interfaces for connecting with external GbE transceivers. 16-port 10/100/1000 Mbps integrated switch controller via 1.25G SerDes/SGMII/fiber • Embedded 256 KB on-chip packet buffer • One 10/100/1000 Mbps In-band Management Port (IMP) with GMII/RGMII/RvMII/MII interface for PHY-less connection to a CPU/management entity (for management purposes only) • Integrated address management • Supports up to 4K MAC addresses • Supports jumbo frames up to 9728 bytes. • Supports EEPROM for low-cost chip configuration • Integrated Motorola® SPI-compatible interface • Supports port mirroring • Port-based VLAN and 4K IEEE 802.1Q tag VLAN • Port-, DiffServ-, MAC-, and IEEE 802.1p-based QoS for four queues • Supports Spanning Tree, Rapid Spanning Tree, and Multiple Spanning Tree protocols (802.1D/1s/1w) • Supports IEEE Standard 802.1X port security • Supports pseudo-PHY MDIO access • MAC-based trunking with link fail-over • Ethernet-in-the-last-mile (EFM) support: OAM and P • Low-power (2.2W total) 1.2V core/2.5V (SGMII I/ O)/3.3V (GMII/MII/RvMII) and 2.5V RGMII operation with 3.3V I/O tolerance • 256-pin FBGA package

目录1、以太网PHY标准寄存器分析1.1 Control Register1.2 Status register1.3 PHY Identifier Register1.4 Auto-Negotiation Advertisement Register1.5 Auto-Negotiation Link Partner Base Page Ability Register1.6 Auto-Negotiation Expansion Register1.7 AN next page Register/AN Li

2.3全双工以太网把双绞线作为以太网的传输介质不但提高了灵活性和降低了成本，而且引入了一种高效的运行模式——全双工模式。所谓全双工，就是数据的发送和接收可以同时进行，互不干扰。传统的网络设备HUB是不支持全双工的，因为HUB的内部是一条总线，数据接收和发送都是在该总线上进行，无法实现全双工通信。 2.4自协商因为以太网的速率和双工类型的多样性，为减少...

以太网PHY寄存器分析 11、以太网PHY标准寄存器分析 21.1 Control Register 21.2 Status register 51.3 PHY Identifier Register 81.4 Auto-Negotiation Advertisement Register 81.5 Auto-Negotiation Link Partner Base Page Ability Register 91.6 Auto-Negotiation Expan

以太网PHY寄存器分析11、以太网PHY标准寄存器分析21.1 Control Register21.2 Status register51.3 PHY Identifier Register81.4 Auto-Negotiation Advertisement Register81.5 Auto-Negotiation Link Partner B...

4,356

社区成员

28,926

社区内容

发帖

与我相关

我的任务

社区管理员

加入社区

近7日
近30日
至今

加载中

查看更多榜单

社区公告

暂无公告

试试用AI创作助手写篇文章吧

+ 用AI写文章