| ??? 01/07/10 19:28 Read: times |
#172245 - NANDs tend to have a uniform hardware interface... Responding to: ???'s previous message |
...the keyword is ONFI (google on).
In fact, *any* general purpose microcontroller could read and write NANDs, hardware-wise that's just a matter of having 17 IO pins or so. Hardware side of it is really quite simple. The trouble is, that even reading is not that simple as reading a NOR FLASH or a RAM or parallel EPROM, not to say writing. The complexity is in the inherently potentially erratic nature of that kind of memory (hence need, for error detection and correction, ECC) and the sector-wise access. When writing, wear leveling might come as an additional complexity. There was recently a thread on 8052.com on FLASH memories of various kinds. JW |
