ANSI/VITA 57.1-2008 - Revisions Under Consideration
The VITA 57.1 working group is considering the following changes to ANSI/VITA
57.1-2008 that would affect compliance and interoperability. NOTE: This
information is provided for information only. While the working group is currently
considering these changes, they may or may not be approved by the working
group and may or may not become part of a revised standard. Contact VITA for
more information. October 2008.
Change of CLK*_C2M to CLK*_M2C
Version 1.0 of the standard has defined clocks signals from the carrier card to the
mezzanine card; CLK0_C2M_N, CLK0_C2M_P, CLK1_C2M_N, CLK1_C2M_P.
It is proposed that these signals will now be redefined as additional ‘M2C’
signals.
Original Signal Label
(Version 1.0)
New Signal Label
(Version 1.1)
CLK0_M2C_P
CLK0_M2C_P
CLK0_M2C_N
CLK0_M2C_N
CLK1_M2C_P
CLK2_M2C_P
CLK1_M2C_N
CLK2_M2C_N
CLK0_C2M_P
CLK1_M2C_P
CLK0_C2M_N
CLK1_M2C_N
CLK1_C2M_P
CLK3_M2C_P
CLK1_C2M_N
CLK3_M2C_N
A rule will also be added to state that the CLK*_M2C signals need to be
populated starting at the lowest ordinal and working up
Application Specific Signal
A permission will be added to allow application specific signals to be added to the
upper unused signals pins of the LA,HA and HB banks. However they will still
need to meet the voltage rules for those banks.
AC coupling to be placed on the mezzanine card
All AC coupling for the DP signals will all be placed on the mezzanine card. No
AC coupling will be placed on the carrier card.
Information Only
