<s>
In	O
computing	O
,	O
an	O
eFuse	B-Device
(	O
electronic	O
fuse	O
)	O
is	O
a	O
microscopic	O
fuse	O
put	O
into	O
a	O
computer	O
chip	O
.	O
</s>
<s>
By	O
utilizing	O
a	O
set	O
of	O
eFuses	B-Device
,	O
a	O
chip	O
manufacturer	O
can	O
allow	O
for	O
the	O
circuits	O
on	O
a	O
chip	O
to	O
change	O
while	O
it	O
is	O
in	O
operation	O
.	O
</s>
<s>
eFuses	B-Device
can	O
be	O
made	O
out	O
of	O
silicon	O
or	O
metal	O
traces	O
.	O
</s>
<s>
Although	O
electromigration	O
is	O
generally	O
undesired	O
in	O
chip	O
design	O
as	O
it	O
causes	O
failures	O
,	O
eFuses	B-Device
are	O
made	O
of	O
weak	O
traces	O
that	O
are	O
designed	O
to	O
fail	O
before	O
others	O
do	O
.	O
</s>
<s>
eFuses	B-Device
are	O
initially	O
marketed	O
by	O
IBM	O
as	O
a	O
way	O
to	O
provide	O
in-chip	O
performance	O
tuning	O
.	O
</s>
<s>
If	O
certain	O
sub-systems	O
fail	O
,	O
or	O
are	O
taking	O
too	O
long	O
to	O
respond	O
,	O
or	O
are	O
consuming	O
too	O
much	O
power	O
,	O
the	O
chip	O
can	O
instantly	O
change	O
its	O
behavior	O
by	O
blowing	O
an	O
eFUSE	B-Device
.	O
</s>
<s>
eFuses	B-Device
are	O
perhaps	O
more	O
commonly	O
used	O
as	O
a	O
one-time	B-General_Concept
programmable	I-General_Concept
ROM	O
.	O
</s>
<s>
The	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
,	O
Nintendo	B-Application
Switch	I-Application
,	O
Pixel	B-Device
6	I-Device
and	O
Samsung	B-Application
Galaxy	I-Application
S22	I-Application
are	O
known	O
for	O
using	O
eFuses	B-Device
this	O
way	O
.	O
</s>
<s>
eFuses	B-Device
used	O
for	O
performance	O
adjustment	O
or	O
unique	O
IDs	O
:	O
</s>
<s>
Sony/Toshiba/IBM	O
Cell	B-General_Concept
used	O
in	O
PlayStation	B-Operating_System
3	I-Operating_System
.	O
</s>
<s>
TI	B-Architecture
MSP430	I-Architecture
MCU	B-Architecture
family	O
for	O
Unique	O
IDs	O
.	O
</s>
<s>
TI	O
FPD-Link	B-Protocol
SERDES	O
for	O
a	O
variety	O
of	O
different	O
settings	O
.	O
</s>
<s>
eFuses	B-Device
known	O
to	O
be	O
used	O
for	O
hardware	O
restriction	O
:	O
</s>
<s>
IBM/Microsoft	O
Xenon	B-Device
CPU	I-Device
in	O
the	B-Operating_System
Xbox	I-Operating_System
360	I-Operating_System
game	O
console	O
.	O
</s>
<s>
NVidia	B-Operating_System
Tegra	I-Operating_System
X1	O
SoC	O
used	O
in	O
the	O
Nintendo	B-Application
Switch	I-Application
hybrid	O
video	O
game	O
console	O
.	O
</s>
<s>
Samsung	B-Application
Knox	I-Application
devices	O
use	O
an	O
eFuse	B-Device
to	O
detect	O
if	O
a	O
non-Samsung	O
boot	O
path	O
has	O
ever	O
been	O
run	O
.	O
</s>
<s>
Resettable	O
eFuses	B-Device
are	O
used	O
for	O
protecting	O
circuits	O
.	O
</s>
