Intel X3450 BV80605001911AQ User Manual
Product codes
BV80605001911AQ
Electrical Specifications
66
Datasheet, Volume 1
7.5
Reserved or Unused Signals
The following are the general types of reserved (RSVD) signals and connection
guidelines:
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-
• 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
SS
, or to any other
signal (including each other) may result in component malfunction or incompatibility
with future processors. See
with future processors. See
for a land 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
appropriate signal level. Unused active high inputs should be connected through a
resistor to ground (V
SS
). Unused outputs may be 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. For details, see
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. For details, see
7.6
Signal Groups
Signals are grouped by buffer type and similar characteristics as listed in
. The
buffer type indicates which signaling technology and specifications apply to the signals.
All the differential signals, and selected DDR3 and Control Sideband signals, have On-
Die Termination (ODT) resistors. There are some signals that do not have ODT and
need to be terminated on the board.
All the differential signals, and selected DDR3 and Control Sideband signals, have On-
Die Termination (ODT) resistors. There are some signals that do not have ODT and
need to be terminated on the board.