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E
Tr
=
T43 (All Non-Test Inputs Setup Time)
Ts =
T44 (All Non-Test Inputs Hold Time)
Tu =
T40 (TDO Float Delay)
Tv =
T37 (TDI, TMS Setup Time)
Tw =
T38 (TDI, TMS Hold Time)
Tx =
T39 (TDO Valid Delay)
Ty =
T41 (All Non-Test Outputs Valid Delay)
Tz =
T42 (All Non-Test Outputs Float Delay)
Tq =
T36 (TRST# Pulse Width)
3.16.
Flexible Motherboard
Recommendations
Table 17 provides recommendations for designing
a "flexible" motherboard for supporting future
Pentium Pro processors. By meeting these
recommendations, the same system design should
be able to support future standard Pentium Pro
processors. If the voltage regulator module is
socketed using Header 8, a smaller range of
PENTIUM® PRO PROCESSOR AT 150, 166, 180, and 200 MHz
Figure 20. Test Timings (Boundary Scan)
Figure 21. Test Reset Timings
support is required by the voltage regulator
module. See Section 8. for information on Header
8. These values are preliminary.
The use of a zero-insertion force socket for the
processor and the voltage regulator module is
recommended. One should also make every
attempt to leave margin in the system where
possible.
35
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