-
7/24/2019 Asynchronous Chip
1/19
-
7/24/2019 Asynchronous Chip
2/19
Presentat!n !n C"!c#"ess Chps $
Presentat!n %"!&'Presentat!n %"!&'
Introduction.
Problems with synchronous circuits.
Clockless / Asynchronous circuits.How clockless chips work?
Simplicity in design.
Applications.Applications (technical perspectie!.
Challenges.
-
7/24/2019 Asynchronous Chip
3/19
Presentat!n !n C"!c#"ess Chps
Intr!*ct!n.Intr!*ct!n.
Str*++"e %!r the ,pr!-e,ent n the ,cr!pr!cess!rs
per%!r,ance/%*nct!nn+.
0 Ppe"nn+
0 (S,*"tane!*s) M*"tthrean+
0 C"!c#"ess / Asynchr!n!*s "!+c
2Synchr!n!*s
-
7/24/2019 Asynchronous Chip
4/19
Presentat!n !n C"!c#"ess Chps 3
Pr!4"e,s &th Synchr!n!*s Appr!achPr!4"e,s &th S
ynchr!n!*s Appr!ach
Dstr4*tn+ the c"!c# +"!4a""y.
Wasta+e !% ener+y.
Tra-erse the chps "!n+est &res n !ne c"!c# cyc"e.
Orer !% arr-a" !% the s+na"s s *n,p!rtant.
C"!c#s the,se"-es c!ns*,e "!t !% ener+y (567).
-
7/24/2019 Asynchronous Chip
5/19
Presentat!n !n C"!c#"ess Chps 8
Synchr!n!*s crc*tS
ynchr!n!*s crc*t
9!n+est path eter,nes
the ,n,*, c"!c#
per!.
Dsspat!n !% ener+y %!r
each c"!c# cyc"e.
EMI s ,!re n
synchr!n!*s e"e,ents.
-
7/24/2019 Asynchronous Chip
6/19
Presentat!n !n C"!c#"ess Chps :
C"!c#"ess chps (Asynchr!n!*s "!+c crc*ts)C"!c#"ess c
hps (Asynchr!n!*s "!+c crc*ts)
C!"c#"ess chps/Asynchr!n!*s/se"%t,e crc*ts.
;*nct!ns a&ay %r!, the c"!c#.
D%%erent parts &!r# at %%erent spees.
Han!%% the res*"t ,,eate"y.
-
7/24/2019 Asynchronous Chip
7/19
Presentat!n !n C"!c#"ess Chps ! E4er+enC!,p*ters &th!*t
c"!c#s 0 I-an E S*ther"an an >! E4er+en
-
7/24/2019 Asynchronous Chip
9/19
Presentat!n !n C"!c#"ess Chps ?
H!& ! they &!r#@H!& ! they &!r#@
! p*re asynchr!n!*s chps are a-a"a4"e.
ses hansha#e s+na"s %!r the ata echan+e.
Data ,!-es !n"y &hen re*re n!t a"&ays.
0 Mn,Fes p!&er c!ns*,pt!n.
0 9ess EMI"ess n!se,!re app"cat!ns.
0 Strea, ata app"cat!ns.
-
7/24/2019 Asynchronous Chip
10/19
Presentat!n !n C"!c#"ess Chps 16
S,p"e an e%%cent es+nS,p"e an e%%cent es+n
! centra"Fe c"!c# re*re.
StanarFe c!,p!nents can 4e *se.
-
7/24/2019 Asynchronous Chip
11/19
Presentat!n !n C"!c#"ess Chps 11
S!,e %eat*resS!,e %eat*res
Inte+rate ppe"nn+ ,!e.
0 D!,n! "!+c.
0 De"ay 0 nsenst-e.
T&! %%erent ,p"e,entat!n eta"s
0 D*a" ra".
0 B*n"e ata.
-
7/24/2019 Asynchronous Chip
12/19
Presentat!n !n C"!c#"ess Chps 1$
A-anta+esA-anta+es
W!r#s at ts a-era+e spee.
9!& p!&er c!ns*,pt!n.
T&ce "%et,e.
9ess heat +enerate.
G!! t! ,!4"e e-ces.
9ess EMI
"ess n!se
,!re app"cat!ns.S,art cars (*e t! asynchr!n!*s nat*re).
-
7/24/2019 Asynchronous Chip
13/19
Presentat!n !n C"!c#"ess Chps 1
A-anta+es (technca" "!!#)A-anta+es (technca" "!!#)
Asynchr!n!*s %!r h+her
per%!r,ance'
0 Dataepenent e"ays.
0 A"" carry 4ts nee t! 4e
c!,p*te.
-
7/24/2019 Asynchronous Chip
14/19
Presentat!n !n C"!c#"ess Chps 13
A-anta+es (technca" "!!#)A-anta+es (technca" "!!#)
Asynchr!n!*s %!r "!& p!&er'
0 C!ns*,es p!&er !n"y &hen
an &here act-e.
0 Rest !% the t,e ret*rns t! a
n!nsspatn+ state *nt" net
act-at!n.
0 I""*strate thr!*+h %re*ency
-er
-
7/24/2019 Asynchronous Chip
15/19
Presentat!n !n C"!c#"ess Chps 18
A-anta+es (technca" "!!#)A-anta+es (technca" "!!#)
Asynchr!n!*s %!r "!& p!&er'
0 A",!st %e p!&er sspat!n s ache-e.
0 Many app"cat!ns s*ch as'
In%rare c!,,*ncat!n rece-er.
;"ter 4an# %!r +ta" hearn+.
In pa+ers.
D!*4"e 4attery "%e.
-
7/24/2019 Asynchronous Chip
16/19
Presentat!n !n C"!c#"ess Chps 1:
A-anta+es (technca" "!!#)A-anta+es (technca" "!!#)
Asynchr!n!*s %!r "!& n!se an "!& e,ss!n'
0 D+ta" s*4crc*ts
Generates -!"ta+e n!se (!n p!&er "nes)
In*ces c*rrent !n s"c!n s*4strate.
E,ts e"ectr!,a+netc raat!n at ts c"!c# %re*ency !r ts
har,!ncs.
-
7/24/2019 Asynchronous Chip
17/19
Presentat!n !n C"!c#"ess Chps 1
