在之前的贴子上,我分析了X61-29C的电路,初步确定了部分无第二个mini PCI-e的X61机型加装插槽及sIM卡槽的可行性,现在进行了详细的分析,制定了加装的技术方案。另起一个新贴子,图文对照全部奉上!
先看看X61主板的架构图,由ICH8M南桥引出两个Mini PCI-e接口,红框下面的是由PCIexpress通道连接,用途为WLAN,也就是无线局域网卡,大家左边的插槽,3945/4965。上面的是由USB2.0通道连接的用于WWAN的接口,当然也保留了PCI express,询盘用的是PCIe。
2个mini PCI slot是不太一样的.只有第二个和SIM卡有联系，且有专门的供电。也就是说这个槽，也就只能装迅盘或者WWAN，如果装其他的WLAN卡，能用但是看不到屏幕下面的信号灯点亮。而左边第一个槽，只能装WLAN或者迅盘，装WWAN肯定找不到sim卡。。。。mini PCI 里面有很多保留定义的针脚，在左边第一个slot里面，定义了WLAN的信号，包括屏幕灯等，第二个slot定义了WWAN的信号，和SIM的连线，USB-CH2通道2的接口(965主板一共有8个USB2.0通道),最最关键的是第二个slot的3.3V供电和第一个不是一条路线，叫做VCC3WAN，是一条专门控制WWAN开关的供电，而第一个slot是普通的3.3V,定义为VCC3B。经过检测Slot2的VCC3WAN电压为0，但是1.5V供电ok。其他针脚都是0V。
一些基本知识
把之前发的基础知识转过来,这样连续性好。
先看看mini PCI-e的定义，然后检测下，哪些针脚没信号
Mini PCI Express Bus Description
A Brief Description of the MiniCard interface. MiniCard is also called Mini PCI Express bus [PCI= Peripheral Component Interface]. The Minicard is a small form factor board used to implement the PCI Express interface on Notebook computers. The card size is 30mm wide by 50.95mm long by 5mm high. The Minicard uses a 52-pin card edge connector, the card pins are fingers at the edge of the card. MiniCard is used to implement both the 1x PCI Express Bus interface and a USB 2.0 interface.
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Mini PCI Express Bus Interface IC Manufacturers
Refer to the main PCI Express Bus for a list of manufacturers producing interface IC's
Like other PC buses, there are no glue logic devices just ASICs and chip sets in PCI Express; Similar to PCI. Refer to the LVDS page for additional information on the LVDS electrical interface. This page provides a comparison of Interface Switching levels for different types of electrical standards.
{Mini PCI Bus Index}
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Mini-PCI Express Online Standards and Specifications
PCI: The original specification 'Peripheral Component Interface', [parallel interface]
PCI Express Bus: [used in desktop computers, the physical layer is not compatible with the PCI bus]
PCIe Mini Card Electromechanical Specification [used in Notebook/Laptop computers]
PCISIG {Peripheral Component Interconnect - Special Interest Group}
PICMG {PCI Industrial Computer Manufacturers Group}
{MiniCard Bus Index}
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Mini PCI Express Connector Manufacturers
A Mini-PCI Express connector accepts a 52-pin card edge with one key slot. The Board has fingers at the card edge, the card key is an absence of fingers.
{MiniCard Bus Index}
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Mini PCI Express Pinout
The Mini-PCI Express 52-pin connector pin out is listed below. I still need to verify the pin out table for errors.
MiniCard Pinout Pin # Signal Name Pin # Signal Name
51 Reserved 52 +3.3V
49 Reserved 50 GND
47 Reserved 48 +1.5V
45 Reserved 46 LED_WPAN#
43 Reserved 44 LED_WLAN#
41 Reserved 42 LED_WWAN#
39 Reserved 40 GND
37 Reserved 38 USB_D+
35 GND 36 USB_D-
33 PETp0 34 GND
31 PETn0 32 SMB_DATA
29 GND 30 SMB_CLK
27 GND 28 +1.5V
25 PERp0 26 GND
23 PERn0 24 +3.3Vaux
21 GND 22 PERST#
19 Reserved (UIM_C4) 20 Reserved
17 Reserved (UIM_C8) 18 GND
Mechanical Key
15 GND 16 UIM_VPP
13 REFCLK+ 14 UIM_RESET
11 REFCLK- 12 UIM_CLK
9 GND 10 UIM_DATA
7 CLKREQ# 8 UIM_PWR
5 Reserved 6 1.5V
3 Reserved 4 GND
1 WAKE# 2 3.3V
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