White papers

StackPC Standard of Embedded Stackable Systems Design

20.07.2015

The StackPC Specification defines the approach to stackable systems design and development. The specification includes all valuable heritages of PC/104 standards along with the features of StackPC connector***.


***StackPC Expansion Connectors A, B

Connector A

PCIe/104 compatible pinout

BANK 1: 4x PCIe x1, 2x USB, SMB

BANK 2,3: 1x PCIe x4, 2x SATA, LPC, 2xGbE, 4x USB, SPI, CAN/RS485/UART

Connector B

PCI/104 or FPE (Fat Pipe Expansion)

PCI/104: 32-bit PCI 4 masters

FPE: PCIe 1x16/2x8/2x4, Display Port, 6x USB 3.0 or 61x UserIO

PC/104, PC/104+wings, EPIC, EBX, 3.5” Adopted



4 Key Innovations Implemented in StackPC Form-Factor: New system approach, compatibility with other Stackable specifications, COM-type application of StackPC modules and new approach to ruggedize system development.  

1. New system approach

  • Stack Up Only
    • Easy schematic (No signal switches)
    • No strict height limitation for CPU & Power modules, bottom side
    • Interface module as a standard part
  • Compatibility with PCIe/104
  • Communication interfaces support through the stack connector
    • Minimization of wired connections
  • Standardization to System power connector
  • New areas of stackable modules application

2. Ruggedized systems orientation

  • Design
    • IP20, IP65, IP67 enclosures
    • Cost effective conduction cooling
    • Interface module as a standard part
    • Ease of assembly and maintenance
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  • Compatibility with PC/104-Express
    • BANK1 is fully compatible
    • BANK2, 3 has levels of full compatibility
  • Communication interfaces support through the stack connector
    • Minimization of wired connections

3. Compatibility with other Stackable Specifications

  • Compatibility with PCIe/104 and PC/104-Express connectors
  • Compatibility with PCI/104

4. COM application

  • StackPC Host as COM-module
    • One side Stack
    • One side heatspreader
    • COM required interfaces: 4x PCIe x1, 1x PCIe x4, 2x SATA, LPC, 2x GbE, 6x USB, SMB, SPI, CAN/RS485/UART
    • PCI: 32-bit PCI 4 masters
    • FPE: PCIe 1x16/2x8/2x4, DP, 6x USB 3.0 or 61x UserIO
  • StackPC Peripheral as COM-expansion
  • Easy to design StackPC carrier board