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Intel

E7505 Chipset MCH Datasheet 25

Signal Description

HXRCOMP,

HYRCOMP

I/O

GTL+

Host RCOMP: These signals are used to calibrate the Host GTL+ I/O buffers.

Since the Host GTL+ IO buffers cover two sides of the die, HXRCOMP is for the

signals on one side of the die, and HYRCOMP handles signals on the other

side of the die.

HXSWNG,

HYSWNG

Analog

Host Voltage Swing: These signals provide a reference voltage used by the

SB RCOMP circuit. HXSWNG is used for the signals handled by HXRCOMP,

and HYSWNG is used for the signals handled by HYRCOMP

HDVREF[3:0]

Analog

Host Data Reference Voltage: Reference voltage input for the 4x data signals

of the Host GTL interface.

HAVREF[1:0]

Analog

Host Address Reference Voltage: Reference voltage input for the 2x address

signals of the Host GTL interface.

CCVREF

Analog

Host Common Clock Reference Voltage: Reference voltage input for the

common clock signals of the Host GTL interface.

Table 2-1. Host Interface Signals (Sheet 3 of 3)

Signal Name Type Description