參數(shù)資料
型號(hào)： RJ80530VY700256
英文描述： Microprocessor
中文描述： 微處理器
文件頁(yè)數(shù)： 76/89頁(yè)
文件大?。?/td> 1672K
代理商： RJ80530VY700256
Mobile Intel
Pentium
III Processor-M Datasheet
76
Datasheet
298340-002
BCLK, BCLK# (I)
The BCLK and BCLK# signals determines the system bus frequency.
On systems with Differential Clocking, both system bus agents must receive these signals to drive their
outputs and latch their inputs on the BCLK rising edge and BCLK# falling edge. All external timing
parameters are specified with respect to the crossing point of the BCLK rising edge and BCLK# falling
edge.
On systems with Single Ended Clocking, both system bus agents must receive the BCLK signal to
drive their outputs and latch their inputs on the BCLK rising edge. All external timing parameters are
specified with respect to the BCLK signal. The BCLK# signal functions as the CLKREF input.
BERR# (I/O - AGTL)
The BERR# (Bus Error) signal is asserted to indicate an unrecoverable error without a bus protocol
violation. It may be driven by either system bus agent and must be connected to the appropriate
pins/balls of both agents, if used. However, the Mobile Intel Pentium III Processor-Ms do not observe
assertions of the BERR# signal.
BERR# assertion conditions are defined by the system configuration. Configuration options enable the
BERR# driver as follows:
Enabled or disabled
Asserted optionally for internal errors along with IERR#
Asserted optionally by the request initiator of a bus transaction after it observes an error
Asserted by any bus agent when it observes an error in a bus transaction
BINIT# (I/O - AGTL)
The BINIT# (Bus Initialization) signal may be observed and driven by both system bus agents and
must be connected to the appropriate pins/balls of both agents, if used. If the BINIT# driver is enabled
during the power-on configuration, BINIT# is asserted to signal any bus condition that prevents
reliable future information.
If BINIT# is enabled during power-on configuration, and BINIT# is sampled asserted, all bus state
machines are reset and any data which was in transit is lost. All agents reset their rotating ID for bus
arbitration to the state after reset, and internal count information is lost. The L1 and L2 caches are not
affected.
If BINIT# is disabled during power-on configuration, a central agent may handle an assertion of
BINIT# as appropriate to the Machine Check Architecture (MCA) of the system.
BNR# (I/O - AGTL)
The BNR# (Block Next Request) signal is used to assert a bus stall by any bus agent that is unable to
accept new bus transactions. During a bus stall, the current bus owner cannot issue any new
transactions.
Since multiple agents may need to request a bus stall simultaneously, BNR# is a wired-OR signal that
must be connected to the appropriate pins/balls of both agents on the system bus. In order to avoid
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