PCI_PCIe User Guide_RevA.pdf - Symmetricom

1. PCI/PCIe TFP Hardware
1.1. Introduction
1.1.1. General Information
The Symmetricom model bc635PCI-V2, bc637PCI-V2, bc635PCIe, and bc637PCIe Time and
Frequency Processors (TFP) are high performance plug-in cards used for precise time synchronization
of the host computer over the PCI or PCIe bus.
Note that these Time and Frequency Processors will be referred as “TFP” or “TFPs” for the remainder
of the document.
The PCI TFP cards operate at 33 MHz and are compatible with PCI Local Bus Specification Revision
2.3. The PCI products support both the 3.3V and 5V signaling environments defined by the PCI Local
Bus Specification. They are considered Universal add-in cards that are capable of detecting the signaling
environment and adapting themselves to that environment.
The PCIe TFP cards offer similar features to the PCI cards. The PCIe cards use a single lane and
support full 2.5 Gbps in either direction.
The TFP products may be used in either Generator mode or Synchronized Generator mode, supplying
precise time (100's nanoseconds through thousands of years) to the host computer. When the card is
operating as a Synchronized Generator, the output signals are synchronized to the timing reference.
The card phase locks to the timing reference and controls the on-board oscillator to remove frequency
errors. If the timing reference is lost, the card continues to increment time and output timing signals
based upon the card's 10 MHz oscillator frequency (flywheeling).
There are eight separate TFP products supported by this manual:
Model
Description
1 bc635PCI-V2 PCI Time & Frequency Processor with TCXO
2 bc637PCI-V2 GPS Synchronized, PCI Time & Frequency Processor with TCXO
3 bc635PCI-V2-OCXO PCI Time & Frequency Processor with OCXO
4 bc637PCI-V2-OCXO GPS Synchronized, PCI Time & Frequency Processor with OCXO
5 bc635PCIe PCI Express Time & Frequency Processor with TCXO
6 bc637PCIe GPS Synchronized, PCI Express Time & Frequency Processor with TCXO
7 bc635PCIe-OCXO PCI Express Time & Frequency Processor with OCXO
8 bc637PCIe-OCXO GPS Synchronized, PCI Express Time & Frequency Processor with OCXO
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