Intel Pentium; Processor 512K Example Thermtrip# Workaround Circuit - Intel Pentium III Processor 512K Design Manual

Figure 23. LV Intel Pentium
NOTES:
1. For Production Boards: Depopulate R5
2. To use ITP: Install R5, Depopulate R4
3. Assumes the inputs to the CPU_PWRGD are open collector signals that are Wire-ANDed together
The example workaround circuit assumes that the PWRGD inputs into the processors are open
collector. Tying the PWRGD inputs together in a Wired-AND fashion allows each processor to
receive PWRGD at the same time but at the latter of the 2 separate PWRGD assertions. When
separation of the PWRGD inputs to each processor is required, extra circuitry is required.
Please consult the Pentium
additional information on this issue.
Design Guide
®
LV Intel Pentium

processor 512K Example THERMTRIP# Workaround Circuit

III
2.5V
R1 330 ohm
R2
150 ohm
R3
TCK
ITP
R5
®
Processor Specification Update (order number 244453) for
III
®
III Processor 512K Dual Processor Platform
PWRGD
R4
TCK
0 ohm
680 ohm
TCK
39 ohm
PWRGD
CPU0
CPU1
CPU1
CPU2
39