--------------------- SILICON7 ------------------------

Power consumption analysis in mobile handset is dependent on operating mode

ACTIVE-TALK Mode
Continual access of SRAM
average SRAM duty cycle @ 80%

STANDBY-SLEEP Mode
Intermittent burst access of SRAM For periodic
(1.28s, 2.56s, 5.12s ) Synchronization with base station
average SRAM duty cycle @ 1.6%

Fig. 1. Screen capture of SRAM continual access in
          ACTIVE-TALK of CDMA phone
          Channel 1 (YELLOW) : CSB
          Channel 2 (MAGENTA) : A0

Fig. 2. Screen capture of SRAM periodic access in           STANDBY-SLEEP mode in every 2.56s
          Channel 1 (YELLOW) : CSB
          Channel 2 (MAGENTA) : A0

Fig. 3. Test handset is implemented with msm3100
silicon7 replace sram with ccsram (SV6P4016)

Battery Life of mobile handset in ACTIVE-TALK
(Slotted paging mode 1, 2.56s)

Battery Life of mobile handset in STANDBY-SLEEP
(Slotted paging mode 1, 2.56s)

	SRAM	CCSRAM
Base-band processor	MSM3100	MSM3100
SRAM Access Cycle	70ns	70ns
Mobile handset Power in ACTIVE MODE¹	300mA	292mA
SRAM Power²	32mA	24mA
Battery Life (600mAh)	2h	2.05h

	SRAM	CCSRAM
Base-band processor	MSM3100	MSM3100
SRAM Access Cycle	70ns	70ns
Mobile handset Power in ACTIVE MODE¹	2.99mA	3.01mA
SRAM Power²	308.8uA	321.6uA
Battery Life (600mAh)	200.7h	199.3h

1) Measured result comes from a CDMA Mobile Handset manufacturer, measured at ?92db SNR
2) Worst case of low power SRAM major supplier : ICC2=40mA, ISB1=12uA
Worst case of SILICON7 SV6P4016 : ICC2=30mA, ISB1=100uA
* ACTIVE Power of mobile phone is highly dependent on mobile handset manufacturer’s application