Intel P8700 Data Sheet - Page 95
Table 19., Signal Description, Sheet 3 of 8, Description, Bus Signal, Data Bus Signals, Signals
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Package Mechanical Specifications and Pin Information Table 19. Signal Description (Sheet 3 of 8) Name Type Description DEFER# DINV[3:0]# Input Input/ Output 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]# (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. DINV[3:0]# Assignment To Data Bus Bus Signal Data Bus Signals DINV[3]# DINV[2]# DINV[1]# DINV[0]# D[63:48]# D[47:32]# D[31:16]# D[15:0]# DPRSTP# DPSLP# DPWR# DRDY# Input Input Input/ Output Input/ Output 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# 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# 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# (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. Data strobe used to latch in D[63:0]#. DSTBN[3:0]# Input/ Output Signals Associated Strobe D[15:0]#, DINV[0]# D[31:16]#, DINV[1]# DSTBN[0]# DSTBN[1]# D[47:32]#, DINV[2]# D[63:48]#, DINV[3]# DSTBN[2]# DSTBN[3]# Datasheet 95