Electronics For You - - Chips -

the epi­cen­tre of de­bates on whether bench­mark scores can ac­tu­ally re­late to real- world per­for­mance. Snap­dragon pro­ces­sors are known to be bet­ter at mul­ti­me­dia re­lated SIMD pro­cesses even though th­ese score lower at bench­mark tests. Snap­dragon’s hard­ware ac­cel­er­a­tion of Adobe Flash and WE­BGL con­tent de­liv­ers a smooth Web ex­pe­ri­ence with­out the freez­ing or jerk­ing seen if you have tasks run­ning in the back­ground.

This SOC also utilises a Har­vard Su­per­scalar ar­chi­tec­ture. It comes with em­bed­ded pro­ces­sor (sup­port­ing GSM, GPRS, EDGE, UMTS/WCDMA, HS­DPA 7.2Mbps, HSUPA 5.76Mbps, HSPA+ 28Mbps/11mbps, MBMS base­band), em­bed­ded sev­enth­gen­er­a­tion gp­sone GPS mod­ule and gp­sonex­tra As­sis­tance.

Ap­ple A5 800MHZ

De­signed by Ap­ple and man­u­fac­tured by Sam­sung us­ing a 45nm process, this is the lat­est ARM pro­ces­sor from Ap­ple fea­tured in its iphone 4S and ipad 2 de­vices. A5 is a chip based upon the dual-core ARM Cor­texA9 Mp­core CPU with NEON SIMD ac­cel­er­a­tor and a dual-core Pow­ervr SGX543MP2 GPU clocked at 200 MHZ. Ap­ple lists the A5 to be clocked at 1 GHZ on the ipad 2’s tech­ni­cal spec­i­fi­ca­tions page, though it can dy­nam­i­cally ad­just its fre­quency to economise on bat­tery life. The SOC also con­tains 512 MB of DDR2 mem­ory clocked at 533 MHZ.

This chip in­cludes an im­age sig­nal pro­ces­sor unit that does ad­vanced im­age post-pro­cess­ing such as face de­tec­tion, white bal­ance and au­to­matic im­age sta­bil­i­sa­tion. Ap­ple re­mains the only com­pany to have a Pow­ervr SGX543 graph­ics so­lu­tion on its SOC. This so­lu­tion makes the A5 chip a lot more ex­pen­sive than the rest.

TI OMAP4460 1.2GHZ

OMAP 4460 fea­tures dual-core ARM Cor­tex-a9 Mp­core built us­ing a 45nm process just like the Ap­ple A5. One dif­fer­ence is that this OMAP is clocked much higher (1.2GHZ) than the A5 ( 800MHZ). TI’S datasheet spec­i­fies that OMAP 4460 can han­dle up to 1.5 GHZ but it’s clocked at 1.2 GHZ to keep bat­tery con­sump­tion within lim­its. The GPU fea­tured here is the Pow­ervr SGX540, which helps in 2D and 3D graph­ics ac­cel­er­a­tion.

This SOC also fea­tures TI’S Smart­flex tech­nol­ogy that re­duces power con­sump­tion by dy­nam­i­cally con­trol­ling the volt­age, fre­quency and power based on the de­vice ac­tiv­ity, modes of op­er­a­tion and tem­per­a­ture. It can han­dle 1080p HD video as well as 1080p stereo­scopic 3D video.

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