P3-POWER.TXT    22-June-1994 ETK
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The P3 connector for the WFD carries the D.C. power to the board.
The connector is a 96 pin connector with 3 rows by 32 columns.
Each DC level is carried on a group of 4x3 pins. The ground is on
the last 12x3 pins.

     connector    nom. volt.     approx. curr. / wfd
   -----------------------------------------------------------
    rows  1- 4      -2 V         4.5 A
    rows  5- 8      +5 V         5.0 A stopped, 8.0 A running
    rows  9-12      -5.2 V       2.0 A
    rows 13-16      +6 V
    rows 17-20      -6 V
    rows 21-32      GND
   -----------------------------------------------------------

The voltages listed are the nominal voltage required by various
chips on the WFD board. The +-6 V is mostly for the daughtercard
Op-Amps. The -5.2 V supply is for ECL components. The -2 V is mostly
used for the ASIC. The +5 V is used by almost every component as
a TTL level. The actual voltage at the P3 connector may be higher
to compensate for a voltage drop between the connector and the chips.