Datasheet 89
Electrical Specifications
NOTES:
1. MSID[2:0] signals are provided to indicate the maximum platform capability to the processor.
2. MSID is used on rPGA988A platforms only.
3. Processors specified for use with a -1.9 mΩ
7.5 Reserved or Unused Signals
The following are the general types of reserved (RSVD) signals and connection
guidelines:
• RSVD - these signals should not be connected
• RSVD_TP - these signals should be routed to a test point
• RSVD_NCTF - these signals are non-critical to function and may be left un-
connected
Arbitrary connection of these signals to V
CC
, V
TT
, V
DDQ
, V
CCPLL
, V
AXG
, V
SS
, or to any
other signal (including each other) may result in component malfunction or
incompatibility with future processors. See Chapter 8 for a pin listing of the processor
and the location of all reserved signals.
For reliable operation, always connect unused inputs or bi-directional signals to an
appropriate signal level. Unused active high inputs should be connected through a
resistor to ground (V
SS
). Unused outputs maybe left unconnected; however, this may
interfere with some Test Access Port (TAP) functions, complicate debug probing, and
prevent boundary scan testing. A resistor must be used when tying bi-directional
signals to power or ground. When tying any signal to power or ground, a resistor will
also allow for system testability. Resistor values should be within ±20% of the
impedance of the baseboard trace, unless otherwise noted in the appropriate platform
design guidelines. For details see Ta ble 7-4 5 .
Table 7-37.Market Segment Selection Truth Table for MSID[2:0]
MSID[2] MSID[1] MSID[0] Description
1,2
Notes
0 0 0 Reserved
0 0 1 Reserved
0 1 0 Reserved
0 1 1 Reserved
1 0 0 Standard Voltage (SV) 35-W Supported 3
1 0 1 Reserved
1 1 0 Reserved
1 1 1 Reserved
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