Intel Celeron Processor Specification Update

INTEL
®
CELERON® PROCESSOR SPECIFICATION UPDATE
65
Figure 1 Celeron® on 0.13 Micron Processor 256K Platforms Workaround
Status: For the steppings affected, see the Summary of Changes at the beginning of this section.
TCK
PWRGD
39 ohmR5
R1
R2
R3
R4
0 ohm
330 ohm
510 ohm
1.3K ohm
TCK
PGA370
ITP
2.5V
For Production Boards:
Depopulate R5
To use ITP:
Install R5, Depopulate R4
• 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. If separation of the
PWRGD in
p
uts to each
p
rocessor is re
q
uired
,
extra circuitr
y
will be re
q
uired.