Intel 500 - DATASHEET REV 003, Техническое описание

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Package Mechanical Specifications and Pin Information
56 Datasheet
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]#.
FERR#/PBE# Output
FERR# (Floating-point Error)/PBE#(Pending Break Event) is a
multiplexed signal and its meaning is qualified with STPCLK#. When
STPCLK# is not asserted, FERR#/PBE# assertion indicates that an
unmasked floating point error has been detected. FERR# is similar to
the ERROR# signal on the Intel 387 coprocessor, and is included for
compatibility with systems using MS-DOS*-type floating-point error
reporting. When STPCLK# is asserted, an assertion of FERR#/PBE#
indicates that the processor has a pending break event waiting for
service. In both cases, assertion of FERR#/PBE# indicates that the
processor should be returned to the Normal state. When FERR#/
PBE# is asserted, indicating a break event, it remains asserted until
STPCLK# is deasserted. Assertion of PREQ# when STPCLK# is active
also causes an FERR# break event.
For additional information on the pending break event functionality,
including identification of support of the feature and enable/disable
information, refer to Volume 3 of the Intel® 64 and IA-32 Intel®
Architectures Software Developer's Manual and the Intel®
Processor
Identification and CPUID Instruction application note.
GTLREF Input
GTLREF determines the signal reference level for AGTL+ input pins.
GTLREF should be set at 2/3 V
CCP
. GTLREF is used by the AGTL+
receivers to determine if a signal is a logical 0 or logical 1. Please
refer to the appropriate platform design guide for details on GTLREF
implementation.
HIT#
HITM#
Input/
Output
HIT# (Snoop Hit) and HITM# (Hit Modified) convey transaction
snoop operation results. Either FSB agent may assert both HIT# and
HITM# together to indicate that it requires a snoop stall, which can
be continued by reasserting HIT# and HITM# together.
Table 15. Signal Description (Sheet 4 of 8)
Name Type Description
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]#