Intel Z520PT CH80566EE014DT Data Sheet
Product codes
CH80566EE014DT
Electrical Specifications
Datasheet
45
3.13
AGTL+ FSB Specifications
Termination resistors are not required for most AGTL+ signals, as these are integrated
into the processor silicon.
Valid high and low levels are determined by the input buffers which compare a signal’s
voltage with a reference voltage called GTLREF (known as V
REF
in previous
documentation).
Table 11 lists the GTLREF and CMREF specifications. The AGTL+ and CMOS reference
voltages (GTLREF and CMREF) should be generated on the system board using high
precision voltage divider circuits. It is important that the system board impedance is
held to the specified tolerance, and that the intrinsic trace capacitance for the AGTL+
signal group traces is known and well- controlled.
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