Specifications
PCIe/104 and PCI/104-Express Specification Revision 3.0 February 17, 2015 Page 4
TABLE OF CONTENTS
1. INTRODUCTION ................................................................................................................................................... 1
1.1. Purpose ...................................................................................................................................................... 1
1.2. Standard Identification ............................................................................................................................... 1
1.3. Description ................................................................................................................................................. 1
1.4. PCIe/104 Type 1 and Type 2 ..................................................................................................................... 2
1.4.1 PCI/104-Express Version 1.0 and 1.1 Host Board Compatibility ............................................ 2
1.4.2 PCI/104-Express Version 1.0 and 1.1 Peripheral Board Compatibility ................................... 3
1.5. PCIe/104 Feature Set ................................................................................................................................. 3
1.5.1 Connector A : PCI Express Bus .............................................................................................. 3
1.6. PCI/104-Express Feature Set ..................................................................................................................... 3
1.6.1 Connector A : Same as 1.5.1 above ......................................................................................... 3
1.6.2 Connector B: PCI Bus: ............................................................................................................ 3
1.7. General Stacking Rules .............................................................................................................................. 3
1.8. Stack Up, Stack Down, and Both ............................................................................................................... 4
1.9. Bus and Signal Group Descriptions ........................................................................................................... 4
1.9.1 PCI Express Expansion Bus ..................................................................................................... 4
1.9.2 SATA Links ............................................................................................................................. 5
1.9.3 LPC Bus ................................................................................................................................... 5
1.9.4 Universal Serial Bus (USB) ..................................................................................................... 5
1.9.5 System Management Bus ......................................................................................................... 6
1.9.6 ATX and Power Management .................................................................................................. 6
1.9.7 RTC Battery ............................................................................................................................. 7
1.9.8 PCI Expansion Bus .................................................................................................................. 7
1.10. References .................................................................................................................................................. 7
2. EXPANSION CONNECTOR A ............................................................................................................................. 8
2.1. Functions.................................................................................................................................................... 8
2.1.1 PCIe/104 Type 1 and Type 2 Common Features ..................................................................... 8
2.1.2 PCIe/104 Type 1 Only Additional Features ............................................................................. 8
2.1.3 PCIe/104 Type 2 Only Additional Features ............................................................................. 8
2.2. Signal Descriptions .................................................................................................................................... 9
2.2.1 PCIe/104 Type 1 ...................................................................................................................... 9
2.2.2 PCIe/104 Type 2 .................................................................................................................... 10
2.3. Signal Naming Convention ...................................................................................................................... 10
2.4. Pin Assignment ........................................................................................................................................ 11
2.4.1 Type 1 x16 PCI Express Link ................................................................................................ 14