Card Reset Logic:按照Hot-plug System Driver的指示,Hot Plug Controller向需要插拔PCIe设备的插槽(Slot)传送PERST#信号。 Power Indicator:主要负责指示设备连接器上面的电源状态。 Attention Indicator:这个是警示灯,提示用户热插拔失败状态,所以一般情况下处于关闭状态。 Card Present Detect Pins:PCIe设计了两个用于检...
硬件层面:PCIE热插拔硬件层面的实现,主要包括以下几个方面:Hot-Plug Controller 、Card Slot Power SwitchingLogic、Card Reset Logic、Power Indicator、Attention Indicator、Card Present Detect Pins。 注解:关于热插拔方面的内容,不再深入介绍,在实际项目应用中很少会使用该功能,感兴趣可参考PCIE协议“Hot Plug”章节。
Hello, I have two Davinci ARM devel board behaving the same way. I received the latest devel board yesterday and it has all defaults, SD-card 2.6.37 512864
type, run the card connect-type {serial|ethernet} command. --- CardID 1 --- Card: present Card connect type: serial Connected status: match Baud rate(bps): 115200 Frame format: 2.0 --- CardID 2 --- Card: absent --- CardID usb ---...
硬件上看,一个新的PCIe设备插入系统,肯定是需要硬件上支持识别到这个插入动作的。因此,Spec定义了一个在位(Present)的pin脚,硬件上用作判断卡是否插入。卡插入时,这个pin被拉低。当然,因为PCIe金手指的长度较长,插入卡时有可能前后高低差异。因此,需要有前后多个present pin来确保金手指完全插入。
Insertion and/or removal of a card into a passive backplane. The card must satisfy specific requirements to support Hot swap. 注意,这里有两个相关概念,前面我们讲的热插拔,其实是广义的“热插拔”。这里的Hot-Plug,为了方便,我们叫做PCIe热插拔,也就是我们现在及后面将要讨论的内容。
Object Bound Variables Description Status Severity Event Code hwPCIeCardBBUPresent 1.hwTrapSeq 2.hwTrapSubjectName 3.hwTrapDescription 4.hwTrapServerity 5.hwTrapEventCode 6.hwTrapEventID 7.hwTrapEventTime 8.hwTrapSource Current Ok 0X0800003F...
Card Present Detect Pins: PCIe设计了两个用于检测PCIe设备是否存在的信号PRSNT1#和PRSNT2#。 PRSNT#1接地,当PCIe设备存在时,PRSNT#2拉高。 在介绍PCIe设备插拔的过程前,我们先了解一下PCIe插槽的On/Off状态: PCIe Slot ON: 上电; RefClk参考时钟打开; ...
硬件元素是指主板总线系统的电气特性方面的支持,包括热插拔控制器(Hot-Plug Controller)、卡槽电源切换逻辑(Card Slot Power Switching Logic)、板卡重置逻辑(Card Reset Logic)、电源指示灯(Power Indicator)、提示按钮(Attention Button)和板卡存在检测引脚(Card Present Detect Pins)等等;固件元素是指主板BIOS必须对热...
The present invention provides a PCIE test card, including a control module, a bus arbiter, an indicating device, at least two PCIE pins having different specifications and at least PCIE bus having different specifications which is corresponding to the PCIE pins, PCIE pins are used for cuttage ...