Elton User Manual Rev 1.04
Page 39
PCI/104-Express Features
Connector A
: Accommodates all the features listed under
Connector A: PCI Express Bus
Connector B:
High-Reliability Rugged Stacking Expansion Bus
PC/104 expansion modules can be mounted directly to the PC/104 bus connector.
Stacking connectors on the module, implement expansion buses for plugging boards vertically, empowering
users to build modular embedded systems from board-level components.
An ISA compatible 32-bit PC/104 bus connector on the expansion module integrates 120 pins. It implements
point-to-point general-purpose I/O interconnects, Switch-based technology, and Packet-protocol to deliver
advanced features, such as Power Management, Quality of Service (QoS), Hot-Plug/Hot-Swap support,
Data Integrity, and Error Handling.
PCI/104-Express and PCIe/104 incorporate all required control and signal lines for ATX and power
management functionalities. These signals include +3.3V, +5V, +12V, -12V and allow maximum power
savings.
Stacking Third Party PC/104 Expansion Boards
As an open standard, PC/104 offers a robust platform on a global level that allows an extensive range of
compatible boards, processors, expansion buses, CPUs, A/V controllers, I/Os, network interfaces, data
acquisition boards, pin-and-socket connectors, operating systems, and software development tools to be
integrated for high-end performance.
The maximum configuration for the PCI bus of PCI-104 modules is four boards plus the Host Board.
Typical side views of module stack configurations with dimensions are illustrated below.
High-Speed Data Transfer
The PC/104 architecture incorporates the PCI Express (PCIe/104 and PCI/104-Express, Generation 1
through Generation 4 versions) high-speed serial expansion bus that transfers data at rates shown in the
table below.
The PC/104 interfaces the host computer using a 1-lane and an 8-lane PCI Express bus. Each lane operates
at 8.0 Gbps (Gen 3). via the OneBank connector. The x8 lane PCIe port from The AGX Xavier Series Module
is connected directly to the 2nd and 3rd Banks on the PCIe/104 connector.
According to PCIe specification, an 8-lane board can be plugged into any 8-lane or 16-lane slot, but not into
a 4-lane or 1-lane slot.
