Part Number:OMAP-L138
Hi,
My customer is considering using OMAP-L138 with 1.3V core voltage and now they are considering the power consumption in their use case.
The power estimation tool is available here :
Their understand they still have to use 1.2V (nominal) for the following lane.
- SATA_VDD
- PLL0_VDDA
- PLL1_VDDA
- USB_CVDD
Now there questions are:
1) When we saw the spread sheet, at least SATA_VDD and USB_CVDD values are changed based on the specified CVDD value. For example,we saw 10.7mW for CVDD=1.3v with the use case of Typical 456Mhz and USB2.0 enabled. However, we saw 9.1mW for CVDD=1.2v. This implies the power consumption for these lane is changed based on actual CVDD. They think this is not correct and the fixed 1.2V should be used for these calculation even if we are in CVDD=1.3v use case. Can you comment on this ? Should they still rely on the value calculated by CVDD=1.3v ?
2) The are assuming the power lane for USB0/1_VDDA33 and DVDD3318_A/B/C is separated each other in their use case. The spread sheet, however, don`t care about this scenario and just sums up the power consumption as *IO33*. When they estimate the value only for USB0/1_VDDA33, can they just use the value on USB2.0 column for the estimation ? For example, we saw 41.4mW in case of Typical 456Mhz ,USB2.0 enabled, and HS Transition enabled in the spread sheet. Is this value applicable to USB0/1_VDDA33 power consumption ?
Best Regards,
NK