Package Mechanical Specifications and Pin Information
Table 16.
Signal Description (Sheet 7 of 8)
Name
Type
Description
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 deasserted, 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.
STPCLK#
Input
TCK (Test Clock) provides the clock input for the processor test bus
(also known as the Test Access Port).
TCK
TDI
Input
Input
TDI (Test Data In) transfers serial test data into the processor. TDI
provides the serial input needed for JTAG specification support.
TDO (Test Data Out) transfers serial test data out of the processor.
TDO provides the serial output needed for JTAG specification
support.
TDO
Output
Input
TEST1,
TEST2
TEST1 and TEST2 must have a stuffing option of separate pull down
resistors to VSS
.
THERMDA
THERMDC
Other
Other
Thermal Diode Anode.
Thermal Diode Cathode.
The processor protects itself from catastrophic overheating by use of
an internal thermal sensor. This sensor is set well above the normal
operating temperature to ensure that there are no false trips. The
processor will stop all execution when the junction temperature
exceeds approximately 125°C. This is signalled to the system by the
THERMTRIP# (Thermal Trip) pin.
THERMTRIP#
Output
TMS (Test Mode Select) is a JTAG specification support signal used by
debug tools.
TMS
Input
Input
Input
TRDY# (Target Ready) is asserted by the target to indicate that it is
ready to receive a write or implicit writeback data transfer. TRDY#
must connect the appropriate pins of both FSB agents.
TRDY#
TRST# (Test Reset) resets the Test Access Port (TAP) logic. TRST#
must be driven low during power on Reset.
TRST#
VCC
Input
Input
Input
Processor core power supply.
V
CCA[3:0]
VCCA provides isolated power for the internal processor core PLL’s.
Processor I/O power supply.
VCCP
Quiet power supply for on die COMP circuitry. These pins should be
connected to VCCP on the motherboard. However, these connections should
enable addition of decoupling on the VCCQ lines if necessary.
V
CCQ[1:0]
Input
Datasheet
61
INTEL [ INTEL ]
