Datasheet 95
Package Mechanical Specifications and Pin Information
DEFER# Input
DEFER# is asserted by an agent to indicate that a transaction
cannot be ensured in-order completion. Assertion of DEFER# is
normally the responsibility of the addressed memory or input/
output agent. This signal must connect the appropriate pins of both
FSB agents.
DINV[3:0]#
Input/
Output
DINV[3:0]# (Data Bus Inversion) are source synchronous and
indicate the polarity of the D[63:0]# signals. The DINV[3:0]#
signals are activated when the data on the data bus is inverted. The
bus agent will invert the data bus signals if more than half the bits,
within the covered group, would change level in the next cycle.
DPRSTP# Input
DPRSTP#, when asserted on the platform, causes the processor to
transition from the Deep Sleep State to the Deeper Sleep state or
Deep Power Down Technology (C6) state. To return to the Deep
Sleep State, DPRSTP# must be deasserted. DPRSTP# is driven by
the ICH9M.
DPSLP# Input
DPSLP# when asserted on the platform causes the processor to
transition from the Sleep State to the Deep Sleep state. To return to
the Sleep State, DPSLP# must be deasserted. DPSLP# is driven by
the ICH9M.
DPWR#
Input/
Output
DPWR# is a control signal used by the chipset to reduce power on
the processor data bus input buffers. The processor drives this pin
during dynamic FSB frequency switching
.
DRDY#
Input/
Output
DRDY# (Data Ready) is asserted by the data driver on each data
transfer, indicating valid data on the data bus. In a multi-common
clock data transfer, DRDY# may be deasserted to insert idle clocks.
This signal must connect the appropriate pins of both FSB agents.
DSTBN[3:0]#
Input/
Output
Data strobe used to latch in D[63:0]#.
Table 19. Signal Description (Sheet 3 of 8)
Name Type Description
DINV[3:0]# Assignment To Data Bus
Bus Signal Data Bus Signals
DINV[3]# D[63:48]#
DINV[2]# D[47:32]#
DINV[1]# D[31:16]#
DINV[0]# D[15:0]#
Signals Associated Strobe
D[15:0]#, DINV[0]# DSTBN[0]#
D[31:16]#, DINV[1]# DSTBN[1]#
D[47:32]#, DINV[2]# DSTBN[2]#
D[63:48]#, DINV[3]# DSTBN[3]#
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