Hub Datasheet

Signal Description
32 Intel
®
E7505 Chipset MCH Datasheet
2.4 Hub Interface_A Signals
2.5 Hub Interface_B Signals
Table 2-4. Hub Interface_A Signals
Signal Name Type Description
HI_A[11:0]
I/O
(as/t/s)
HI2
HI_A Signals: These signals are used for the hub interface between the Intel
®
ICH4 and the MCH.
PRCOMP_A
I/O
HI2
Compensation for HI: This signal is used to calibrate the HI_A I/O Buffers.
PREF_A
I
Analog
HI_A Reference: This signal is the reference voltage input for HI_A.
PSTRBF_0
I/O
(as/t/s)
HI2
Packet Strobe First: One of two strobe signals used to transmit or receive
packet data over HI_A.
PSTRBS_0
I/O
(as/t/s)
HI2
Packet Strobe Second: One of two strobe signals used to transmit or receive
packet data over HI_A.
PSWNG_A
I
Analog
HI_A Voltage Swing: This signal provides a reference voltage used by the
HI_A RCOMP Circuit.
Table 2-5. Hub Interface_B Signals
Signal Name Type Description
HI_B[21:20,18:0]
I/O
(as/t/s)
HI2
HI_B Signals: These signals are used for the 16-bit hub interface and the
MCH.
NOTE: HI_B19 is intentionally missing.
PRCOMP_B
I/O
HI2
Compensation for HI: This signal is used to calibrate the HI_B I/O Buffers
PREF_B
I
Analog
HI_B Reference: This is the reference voltage input for HI_B.
PSTRBF_B
PSTRBS_B
I/O
(as/t/s)
HI2
Lower Packet Strobe: First HI Strobe and second HI Strobe together provide
timing for source synchronous data transfer on HI_B16 and HI_B[7:0]. The
agent that is sourcing the data drives this signal.
PUSTRBF_B
PUSTRBS_B
I/O
(as/t/s)
HI2
Upper Packet Strobe: First Upper HI Strobe and second Upper HI Strobe
together provide timing for source synchronous data transfer on HI_B17 and
HI_B[15:8]. The agent that is sourcing the data drives this signal.
PSWNG_B
I
Analog
HI_B Voltage Swing: This signal provides a reference voltage used by the
HI_B RCOMP Circuit.