Datasheet

Signal Description
R
Datasheet 39
Signal Name Type Description
GPAR I/O
AGP
Parity.
During FRAME# Operation: G_PAR is driven by the GMCH/MCH when it
acts as a FRAME#-based AGP initiator during address and data phases for
a write cycle, and during the address phase for a read cycle. G_PAR is
driven by the GMCH/MCH when it acts as a FRAME#-based AGP target
during each data phase of a FRAME#-based AGP memory read cycle.
Even parity is generated across G_AD[31:0] and G_CBE[3:0]#.
During SBA and PIPE# Operation: This signal is not used during SBA
and PIPE# operation.
PCIRST# from the ICH4-M is assumed to be connected to RSTIN# and is used to reset AGP
interface logic within the GMCH/MCH. The AGP agent will also typically use PCIRST#
provided by the ICH4-M as an input to reset its internal logic.
2.4 Hub Interface Signals
Table 10. Hub Interface Signals
Signal Name Type Description
HL[10:0] I/O Packet Data: Data signals used for HI read and write operations
HLSTB I/O Packet Strobe: One of two differential strobe signals used to transmit or
receive packet data over HI.
HLSTB# I/O Packet Strobe Complement: One of two differential strobe signals used
to transmit or receive packet data over HI.