WRAP - White RAbbit Pluggable
WRAP, White RAbbit Pluggable, is an FMC board designed to provide
easy-to-use WR functionality
It's a turnkey solution being able to wrap up all the functionalities of
a White Rabbit solution in a single and pluggable module.
The pluggable module is a cost effective option to integrate precise
timing in a custom system, replacing the PHY interface. WRAP provides a
standard GigabitMedia-Independent-Interface (GMII) along with timing and
time-related services (e.g. timestamping of events).
Specification
FPGA & non-volatile memory
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Xilinx Artix-7 XC7A35T
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Footprint compatible to larger FPGAs
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128 Mbit Serial Flash (Micron N25Q128, supported by Xilinx. Attention: End-of-life announced 12/2016)
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JTAG connector (optional, on board)
Network data interfaces
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Dual SFP connector to WR network for time and data redundancy
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GMII and MDIO interface to user logic (through FMC connector)
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Simplified Ethernet interface to user logic (through FMC connector
Time synchronization interface
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10 MHz and 1 PPS (front panel and FMC connector) with sub-ns accuracy and sub-10ps precision
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62.5MHz/125MHz WR clock (through a board-to-board connector)
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Custom frequency (limited by mounted PLL dividers) (FMC connector)
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Time of the day: NMEA or IRIG timecode (TBD)
Time-related services
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4/8 input lines with a configurable TDC (4ns timestamping resolution) (FMC connector)
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4/8 output lines triggered by time-event (resolution to be determined) (FMC connector)
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High speed SPI interface for configuration and timestamp retrieval
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Timestamp of each sent/received Ethernet frame (TBD feasibility)
Management
- SPI interface (through a board-to-board connector)
Additional features
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Over-the-network firmware update
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Watchdog
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Temperature sensor
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Univoque ID for storage
Documents
Contacts
Status
Date | Event |
21-06-2016 | Start of project |
21-06-2016 | Added description |
19-07-2016 | Feature updated |
07-02-2017 | Added design considerations |
Mattia Rizzi, Erik van der Bij - 5 January 2017