Intel D2500 DF8064101055400 Data Sheet
Product codes
DF8064101055400
Datasheet - Volume 1 of 2
57
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.
4.7
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 Control Sideband Asynchronous signals are required to be asserted/deasserted for
at least eight BCLKs in order for the processor to recognize the proper signal state.
4.8
Test Access Port (TAP) Connection
Due to the voltage levels supported by other components in the Test Access Port (TAP)
logic, Intel recommends the processor be first in the TAP chain, followed by any other
components within the system. A translation buffer should be used to connect to the
rest of the chain unless one of the other components is capable of accepting an input of
the appropriate voltage. Two copies of each signal may be required with each driving a
different voltage level.
4.9
DC Specifications
the thermal specifications (as specified in the Thermal / Mechanical Specifications and
Guidelines), clock frequency, and input voltages.
for the processor and are valid only while meeting specifications for junction
temperature, clock frequency, and input voltages. Care should be taken to read all
notes associated with each parameter.
4.9.1
Flexible Motherboard Guidelines (FMB)
This is not applicable for D2000 series and N2000 series Next Generation Intel®
Atom™ Processor based desktop platform.