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about OMAP-L138 Power Consumption

because my board IOs is 3.3V ,so I left   All static 1.8V IO supplies (DVDD18, DDR_DVDD18, USB0_VDDA18, USB1_VDDA18 and SATA_VDDR) and any of the LVCMOS IO supply groups used at 1.8V nominal (DVDD3318_A,DVDD3318_B, or DVDD3318_C).   unconnected, is there any questions? my borad 3.3V  Power Consumption sometimes is 0.2A, sometimes is0.8A.