Intel 430 LF80538NE0301M Data Sheet
Product codes
LF80538NE0301M
18
Intel
®
Celeron
®
M Processor Datasheet
Electrical Specifications
3.6
Signal Terminations and Unused Pins
All RSVD (RESERVED) pins must remain unconnected. Connection of these pins to V
CC
, V
SS
, or
to any other signal (including each other) can result in component malfunction or incompatibility
with future Intel Celeron M processors. See
for a pin listing of the processor and the
location of all RSVD pins.
For reliable operation, always connect unused inputs or bidirectional signals to an appropriate
signal level. Unused active low AGTL+ inputs may be left as no connects if AGTL+ termination is
provided on the processor silicon. Unused active high inputs should be connected through a resistor
to ground (V
SS
). Unused outputs can be left unconnected.
For details on signal terminations, please refer to the platform design guides. TAP signal
termination requirements are also discussed in ITP700 Debug Port Design Guide.
The TEST1, TEST2, and TEST3 pins must be left unconnected but should have a stuffing option
connection to V
SS
separately via 1-k
Ω, pull-down resistors.
3.7
FSB Signal Groups
In order to simplify the following discussion, the FSB signals have been combined into groups by
buffer type. AGTL+ input signals have differential input buffers, which use GTLREF as a reference
level. In this document, the term "AGTL+ Input" refers to the AGTL+ input group as well as the
AGTL+ I/O group when receiving. Similarly, "AGTL+ Output" refers to the AGTL+ output group
as well as the AGTL+ I/O group when driving.
With the implementation of a source synchronous data bus comes the need to specify two sets of
timing parameters. One set is for common clock signals which are dependant upon the crossing of
the rising edge of BCLK0 and the falling edge of BCLK1. The second set is for the source
synchronous signals which are relative to their respective strobe lines (data and address) as well as
the rising edge of BCLK0. Asychronous signals are still present (A20M#, IGNNE#, etc.) and can
become active at any time during the clock cycle.
identifies which signals are common
clock, source synchronous, and asynchronous.