L2500 datasheet(52/91 Pages) INTEL

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Package Mechanical Specifications and Pin Information

Datasheet

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. In

order to return to the Deep Sleep State, DPRSTP# must be

deasserted. DPRSTP# is driven by the Intel® ICH7M chipset.

DPSLP#

Input

DPSLP# when asserted on the platform causes the processor to

transition from the Sleep State to the Deep Sleep state. In order to

return to the Sleep State, DPSLP# must be deasserted. DPSLP# is

driven by the ICH7M chipset.

DPWR#

Input

DPWR# is a control signal from the Mobile Intel 945 Express

Chipset family used to reduce power on the processor data bus

input buffers.

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]#.

DSTBP[3:0]#

Input/

Output

Data strobe used to latch in D[63:0]#.

Table 17.

Signal Description (Sheet 4 of 9)

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]#

Signals

Associated

Strobe

D[15:0]#, DINV[0]#

DSTBP[0]#

D[31:16]#, DINV[1]#

DSTBP[1]#

D[47:32]#, DINV[2]#

DSTBP[2]#

D[63:48]#, DINV[3]#

DSTBP[3]#

L2500 Datasheet(PDF) 52 Page - Intel Corporation

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