TreoCentral.com - View Single Post - 700p Memory

kocoman · 12/26/2006, 05:10 PM

So why is the difference that the newer treos uses NAND? so the newer treos have less chance of corruption because they copy the data to ram first before execution? and thus the lag problem? while the treo 650 easily have corruption because the flash is easily writable/corruptable?

Flash memory chips generally come in two flavors, NOR and NAND. NOR is the variety usually found on embedded devices, while NAND is the kind normally found inside solid-state mass storage devices, such as USB pen drives. NOR flash chips are connected to the processor via address and data lines like normal RAM; NAND flash is interfaced using a slim sequential interface. Code resident on NOR flash can be executed directly, while that stored on NAND flash must be copied to RAM before execution. NAND flash has the added limitation that it restricts the number of consecutive writes to a flash sector before an erase is necessitated.

12/26/2006, 05:10 PM	#12 (permalink)
kocoman Member Join Date: Oct 2006 Posts: 641 Thanks: 0 Thanked 0 Times in 0 Posts	So why is the difference that the newer treos uses NAND? so the newer treos have less chance of corruption because they copy the data to ram first before execution? and thus the lag problem? while the treo 650 easily have corruption because the flash is easily writable/corruptable? Flash memory chips generally come in two flavors, NOR and NAND. NOR is the variety usually found on embedded devices, while NAND is the kind normally found inside solid-state mass storage devices, such as USB pen drives. NOR flash chips are connected to the processor via address and data lines like normal RAM; NAND flash is interfaced using a slim sequential interface. Code resident on NOR flash can be executed directly, while that stored on NAND flash must be copied to RAM before execution. NAND flash has the added limitation that it restricts the number of consecutive writes to a flash sector before an erase is necessitated.