Datasheet

Mobile Intel

Pentium

III Processor in BGA2 and Micro-PGA2 Packages at 1 GHz,

900 MHz, 850 MHz, 800 MHz, 750 MHz, 700 MHz, Low-voltage 750 MHz, Low-voltage

700 MHz, Low-voltage 600 MHz, Ultra Low-voltage 600 MHz and Ultra Low-voltage 500 MHz

283653-002 Datasheet 77

TESTHI (I - 1.5V Tolerant)

The TESTHI (Test input High) is used during processor test and needs to be pulled high during

normal operation.

TESTLO[2:1] (I - 1.5V Tolerant)

The TESTLO[2:1] (Test input Low) signals are used during processor test and needs to be pulled

to ground during normal operation.

THERMDA, THERMDC (Analog)

The THERMDA (Thermal Diode Anode) and THERMDC (Thermal Diode Cathode) signals

connect to the anode and cathode of the on-die thermal diode.

TMS (I - 1.5V Tolerant)

The TMS (Test Mode Select) signal is a JTAG support signal used by debug tools.

TRDY# (I - GTL+)

The TRDY# (Target Ready) signal is asserted by the target to indicate that the target is ready to

receive write or implicit write-back data transfer. TRDY# must be connected to the appropriate

pins/balls on both agents on the system bus.

TRST# (I - 1.5V Tolerant)

The TRST# (Test Reset) signal resets the Test Access Port (TAP) logic. The mobile Pentium III

processors do not self-reset during power on; therefore, it is necessary to drive this signal low

during power-on reset.

VID[4:0] (O – Open-drain)

The VID[4:0] (Voltage ID) pins/balls can be used to support automatic selection of power supply

voltages. These pins/balls are not signals, they are either an open circuit or a short to V

on the

processor substrate. The combination of opens and shorts encodes the voltage required by the

processor. External to pull-ups are required to sense the encoded VID. For processors that have

Intel SpeedStep technology enabled, VID[4:0] encode the voltage required in the battery-

optimized mode. VID[4:0] are needed to cleanly support voltage specification changes on mobile

Pentium III processors. The voltage encoded by VID[4:0] is defined in Table 37. A “1” in this

table refers to an open pin/ball and a “0” refers to a short to V

. The power supply must provide

the requested voltage or disable itself.

Please note that in order to implement VID on the BGA2 package, some VID[4:0] balls may be

depopulated. For the BGA2 package, a “1” in Table 37implies that the corresponding VID ball is

depopulated, while a “0” implies that the corresponding VID ball is not depopulated.