History

fmc-dio-5chttla FMC 5-channel Digital I/O module

The fmc-dio-5chttla 5-channel digital I/O module is a simple board for digital I/O on LEMO connectors.
It has been designed for testing White Rabbit functionality as part of the SPEC Demonstration Package for White Rabbit (manual), and it can be used for other applications too.

Functional specifications

  • 5 input/output ports (Lemo 00 connectors)
  • Output levels: LVTTL, capable of driving +3.3 V over a 50-Ohm load. At power-up the outputs should be in Hi-Z state
  • Input levels: any logic standard from Vih = 1 V to Vih = 5 V (programmable threshold)
  • Output Rise/fall times: max. 2 ns
  • Input bandwidth: min. 200 MHz
  • Programmable 50-Ohm input termination in each channel
  • LVDS I/O on the carrier side
  • One of the inputs shall be capable of driving a global clock net in the carrier's FPGA
  • Inputs need to be protected against +15V pulses with a pulse width of at least 10us @ 50Hz (with protection diodes if possible)
  • Withstands a continuous short-circuit on all the outputs at the same time

Block diagram

Project information

Contacts

Commercial producers

General question about project

Project Status

Date Event
27-05-2011 Start of brainstorming.
19-07-2011 Five cards built. Has some bugs.
20-09-2011 Updated schematics in SVN. Will pass through CERN's design office.
12-10-2011 Production documentation available in EDMS. Project closed.
07-11-2011 Seven Solutions will produce and commercialise the cards.

Tom Wlostowski, Erik van der Bij - 7 November 2011

block_diagram.jpg (50.4 kB) Tomasz Wlostowski, 23/09/2011 15:35

dio_small.jpg (69.2 kB) Tomasz Wlostowski, 12/11/2011 15:08