Datasheet
71
Land Listing and Signal Descriptions
SLP#
Input
SLP# (Sleep), when asserted in Extended Stop Grant or Stop Grant
state, causes the processor to enter the Sleep state. In the Sleep
state, the processor stops providing internal clock signals to all
units, leaving only the Phase-Locked Loop (PLL) still operating.
Processors in this state will not recognize snoops or interrupts. The
processor will recognize only assertion of the RESET# signal,
deassertion of SLP#, and removal of the BCLK input while in Sleep
state. If SLP# is de-asserted, the processor exits Sleep state and
returns to Extended Stop Grant or Stop Grant state, restarting its
internal clock signals to the bus and processor core units. If
DPSLP# is asserted while in the Sleep state, the processor will exit
the Sleep state and transition to the Deep Sleep state. Use of the
SLP# pin, and corresponding low power state, requires chipset
support and may not be available on all platforms.
NOTE: Some processors may not have the Sleep State enabled,
refer to the Specification Update for specific processor and
stepping guidance.
SMI#
Input
SMI# (System Management Interrupt) is asserted asynchronously
by system logic. On accepting a System Management Interrupt, the
processor saves the current state and enter System Management
Mode (SMM). An SMI Acknowledge transaction is issued, and the
processor begins program execution from the SMM handler.
If SMI# is asserted during the de-assertion of RESET#, the
processor will tri-state its outputs.
STPCLK#
Input
STPCLK# (Stop Clock), when asserted, causes the processor to
enter a low power Stop-Grant state. The processor issues a Stop-
Grant Acknowledge transaction, and stops providing internal clock
signals to all processor core units except the FSB and APIC units.
The processor continues to snoop bus transactions and service
interrupts while in Stop-Grant state. When STPCLK# is de-
asserted, the processor restarts its internal clock to all units and
resumes execution. The assertion of STPCLK# has no effect on the
bus clock; STPCLK# is an asynchronous input.
TCK
Input
TCK (Test Clock) provides the clock input for the processor Test Bus
(also known as the Test Access Port).
TDI
Input
TDI (Test Data In) transfers serial test data into the processor. TDI
provides the serial input needed for JTAG specification support.
TDO
Output
TDO (Test Data Out) transfers serial test data out of the processor.
TDO provides the serial output needed for JTAG specification
support.
TESTHI[12,10:0]
Input
The TESTHI[12,10:0] lands must be connected to the processor’s
appropriate power source (refer to VTT_OUT_LEFT and
VTT_OUT_RIGHT signal description) through a resistor for proper
processor operation. See
for more details.
Table 24.
Signal Description (Sheet 8 of 10)
Name
Type
Description
Содержание BX80571E5300 - Pentium 2.6 GHz Processor
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