sdram power calculator
TRANSCRIPT
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File Name : SDRAM_Power_Calc_10.XLS
Revision : 1.0
Date : April 10, 2001
E-Mail :
Company : Micron Technology, Inc.
Description :
Limitations :
Notes :
Disclaimer :
Copyrigh ! 2001 Micron Se"icon#$cor Pro#$c%, Inc.
All righ% re%er&e#
Calc$lae% he power con%$"e# 'y an SDRAM 'a%e# on %y%e"operaing con#iion% an# he #e&ice #aa %hee.
T(IS SPR)ADS())T IS *+R )STIMATI- PRP+S)S +L/. A/I*+RMATI+ PR+ID)D ()R)I IS PR+ID)D AS IS ADIT(+T ARRATI)S +* A/ 3ID. MICR+ ARRATS +L/T(AT ITS PR+DCTS C+MPL/ IT( MICR+4S SP)CI*ICATI+S())T *+R T() PR+DCT AT T() TIM) +* D)LI)R/5 PR+ID)DT(AT D)IATI+S *R+M SP)CI*ICATI+S (IC( D+ +TMAT)RIALL/ A**)CT *+RM, *IT +R *CTI+ +* SC(PR+DCT I T() S/ST)M AD C+*I-RATI+ I +R *+R(IC( IT IS IITIALL/ ISTALL)D +R 6ALI*I)D 7/ CST+M)RS(ALL +T 7) D))M)D T+ C+STITT) *AILR) T+ C+MPL/IT( SC( SP)CI*ICATI+S.
S)) MICR+4S STADARD T)RMS AD C+DITI+S +* SAL)*+R C+MPL)T) ARRAT/ D)TAILS.
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SDRAM Confguration and Data Sheet Parameters
DRAM Den%iy 128 M
$"'er o8 D6% per DRAM 8
Spee# -ra#e -7E
Parameter Condition al!e "nits
#$%
#
Ma9i"$" Aci&e C$rren :calc$lae#; 1#1 "A
Ma9i"$" +peraing C$rren 1%& "A
Ma9i"$" Precharge Power; 1( n%
Mini"$" aci&ae
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DRAM Usage Conditions in the System Environment
#$#
Sy%e" C3 *reB$ency 1## M(
+$p$ Loa# in Sy%e" 2' p*
7&0
8&0
&0
12&n%
(&0
1'0
al!es t)at may *e !pdated are s)o+n in ,reen$
Sy%e" CC
Percenage o8 i"e ha all 'an>% on heDRAM are in a precharge# %ae
The percenage o8 he all 'an> prechargei"e 8or which C3) i% hel# L+
The percenage o8 he a lea% one 'an>aci&e i"e 8or which C3) i% hel# L+
The a&erage i"e 'eween ACT co""an#%o hi% DRAM :incl$#e% ACT o %a"e or#i=eren 'an>% in he %a"e DRAM #e&ice;
The percenage o8 cloc> cycle% which areo$p$ing rea# #aa 8ro" he DRAM
The percenage o8 cloc> cycle% which areinp$ing wrie #aa o he DRAM
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System Derating or 128Mb SDRAM !8" #$E S%eed &rade'
p:PR)_PD; .2 " @.0 " P:PR)_PD; ?.@ "
p:PR)_ST7/; 1E0.0 " 2F.2 " p:PR)_ST7/; 21.1 "
p:ACT_PD; .2 " 0.0 " P:ACT_PD; 0.0 "
p:ACT_ST7/; 1E0.0 " [email protected] " P:ACT_ST7/; @F.? "
p:R)*; ?. " ?. " P:R)*; ?.0 "
p:ACT; 2G2.F " 1@.? " P:ACT; 122.G "
p:R; DRAM wrie power @[email protected] " 2.1 " P:R; F2.1 "
p:RD; DRAM rea# power @[email protected] " 1F. " P:RD; 1?E.E "
p:D6; D6 o$p$ power 12.E " G.1 " P:D6; F.G "
'2$ m 444.5 mW
Power i% calc$lae# a8er a8er %caling 8or DD. e9, %o"e power% are %cale# 8or 8reB$ency e=ec% o #erae 8ro" e% con#iion o $%e con#iion. *inally, he%en$"'er% are %cale# 8or ac$al %y%e" $%age. All para"eer% are calc$lae# an# reB$ire no $%er inp$.
orst-Case Po+er 3asedon Data 4)eet
o+er era e or4ystem "sa,e
Conditions 5np!t 5ntot)is Model
Po+er 4caled /or 6ct!al4ystem C Fre!ency and CC
#$ring precharge powergro$n# power $%e##$ring i#le %an#'y
7ac>gro$n# power $%e##$ring aci&e powergro$n# power $%e##$ring aci&e %an#'y
7ac>gro$n# power o
co"plee re8re%he%
DRAM power 8or ACTHPR)co""an#%
otal DR6M Po+er Cons!med
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128Mb SDRAM (ith 8 D)s and a #$E S%eed &rade
Po(er Consum%tion Summary
P:PR)_PD; ?.@ "
P:PR)_ST7/; 21.1 "
P:ACT_PD; 0.0 "
P:ACT_ST7/; @F.? "
P:R)*; ?.0 "otal 3ac.,ro!nd Po+er 72$8 m
P:ACT; 122.G "
otal 6ctivate Po+er 122$ m
P:R; F2.1 "
P:RD; 1?E.E "
P:D6; F.G "
otal Read9rite Po+er 2(8$8 m
Toal SDR SDRAM Power @@@.F "
Sy%e" i% operaing a 1?? M( a CC ?.?. Rea# 'an#wi#h i% F?.2M7H% wih wrie 'an#wi#h o8 1G.GF M7H%. The #aa '$% i%i#le @FJ o8 he i"e. ACT co""an#% are %eparae# 'y 120n% on a&erage. All para"eer% are calc$lae# an# reB$ire no $%er
0.0
F0.0
100.0
1F0.0
200.0
2F0.0
?00.0
@F0.0
F00.0Po+er Cons!mption per Device
Total Read/Wr ite Pow er
Total Activate Pow er
Total Background Power
DevicePo+er:m2
;
P:PR)_PD; P:PR)_ST7/; P:ACT_PD; P:ACT_ST7/; P:R)*; P:ACT; P:R; P:RD; P:D6;
0.0
20.0
@0.0
0.0
E0.0
100.0
120.0
10.0Po+er Cons!mption 3rea.o!t
Po
+er:m2;