Intel G530 BXC80623G530 Benutzerhandbuch
Produktcode
BXC80623G530
74
Intel
®
Celeron
®
Processor on 0.13 Micron Process in the 478-Pin Package
Datasheet
Pin Listing and Signal Definitions
D[63:0]#
Input/
Output
D[63:0]# (Data) are the data signals. These signals provide a 64-bit data path
between the processor system bus agents, and must connect the appropriate
pins on all such agents. The data driver asserts DRDY# to indicate a valid data
transfer.
between the processor system bus agents, and must connect the appropriate
pins on all such agents. The data driver asserts DRDY# to indicate a valid data
transfer.
D[63:0]# are quad-pumped signals and will thus be driven four times in a
common clock period. D[63:0]# are latched off the falling edge of both
DSTBP[3:0]# and DSTBN[3:0]#. Each group of 16 data signals correspond to a
pair of one DSTBP# and one DSTBN#. The following table shows the grouping of
data signals to data strobes and DBI#.
common clock period. D[63:0]# are latched off the falling edge of both
DSTBP[3:0]# and DSTBN[3:0]#. Each group of 16 data signals correspond to a
pair of one DSTBP# and one DSTBN#. The following table shows the grouping of
data signals to data strobes and DBI#.
The DBI# pins determine the polarity of the data signals. Each group of 16 data
signals corresponds to one DBI# signal. When the DBI# signal is active, the
corresponding data group is inverted and therefore sampled active high.
signals corresponds to one DBI# signal. When the DBI# signal is active, the
corresponding data group is inverted and therefore sampled active high.
DBI[3:0]#
Input/
Output
DBI[3:0]# (Data Bus Inversion) are source synchronous and indicate the polarity
of the D[63:0]# signals. The DBI[3:0]# signals are activated when the data on the
data bus is inverted. If more than half the data bits within a 16-bit group would
have been asserted electrically low, the bus agent may invert the data bus
signals for that particular sub-phase for that 16-bit group.
of the D[63:0]# signals. The DBI[3:0]# signals are activated when the data on the
data bus is inverted. If more than half the data bits within a 16-bit group would
have been asserted electrically low, the bus agent may invert the data bus
signals for that particular sub-phase for that 16-bit group.
DBR#
Output
DBR# (Data Bus Reset) is used only in processor systems in which no debug
port is implemented on the system board. DBR# is used by a debug port
interposer so that an in-target probe can drive system reset. If a debug port is
implemented in the system, DBR# is a not connect in the system. DBR# is not a
processor signal.
port is implemented on the system board. DBR# is used by a debug port
interposer so that an in-target probe can drive system reset. If a debug port is
implemented in the system, DBR# is a not connect in the system. DBR# is not a
processor signal.
DBSY#
Input/
Output
DBSY# (Data Bus Busy) is asserted by the agent responsible for driving data on
the processor system bus to indicate that the data bus is in use. The data bus is
released after DBSY# is deasserted. This signal must connect the appropriate
pins on all processor system bus agents.
the processor system bus to indicate that the data bus is in use. The data bus is
released after DBSY# is deasserted. This signal must connect the appropriate
pins on all processor system bus agents.
DEFER#
Input
DEFER# is asserted by an agent to indicate that a transaction cannot be
guaranteed 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 all processor system bus agents.
guaranteed 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 all processor system bus agents.
DP[3:0]#
Input/
Output
DP[3:0]# (Data parity) provide parity protection for the D[63:0]# signals. They are
driven by the agent responsible for driving D[63:0]#, and must connect the
appropriate pins of all Celeron processor on 0.13 micron process system bus
agents.
driven by the agent responsible for driving D[63:0]#, and must connect the
appropriate pins of all Celeron processor on 0.13 micron process system bus
agents.
Table 36. Signal Description (Sheet 3 of 8)
Name
Type
Description
Quad-Pumped Signal Groups
Data Group
DSTBN#/
DSTBP#
DBI#
D[15:0]#
0
0
D[31:16]#
1
1
D[47:32]#
2
2
D[63:48]#
3
3
DBI[3:0]# Assignment To Data Bus
Bus Signal
Data Bus Signals
DBI3#
D[63:48]#
DBI2#
D[47:32]#
DBI1#
D[31:16]#
DBI0#
D[15:0]#