4 ms·
Well I think the main problem is going to be the power draw. An SD Card has like a 100ma power envelope. The only way to overcome this is to shrink your parts
by cptskippy 10y ago
Well I think the main problem is going to be the power draw. An SD Card has like a 100ma power envelope. The only way to overcome this is to shrink your parts down so that their power consumption comes under that.
Flash reads are power cheap but flash writes are power expensive.
- Dylan16807 10y agoAdding more capacity at the same speed doesn't require more active area or power draw.
- cptskippy 10y agoAdding capacity to an SD card means either increasing the density of the flash chip or using more flash chips. In this case the op was referring to doing the later strategy. In order for additional dies to not alter the power characteristics of the card, the controller chip would have to have some sort of active power management built in power off dies that aren't in use.
- Dylan16807 10y agoIdle energy use for a typical SD card is well under 1mA. Even though the OP was suggesting something a bit more sophisticated than 4 entire separate cards inside one, it would work just fine.