BANK - also "memory bank"
A bank of memory (flash or RAM) consists of all those memory chips on
your system that are controlled by the same chip select signal.
For example, a system might consist of one flash chip with a 8 bit bus
interface, which is attached to the CS0 chip select signal, 2 flash
chips with a 16 bit bus interface, which are attached to the CS1 chip
select signal, and 2 SDRAM chips with a 16 bit bus interface, which
are attached to the CS2 chip select signal.
This setup results in a system with 3 banks of memory:
* 1 bank of flash, 8 bit wide (CS0)
* 1 bank of flash, 32 bit wide (CS1)
* 1 bank of SDRAM, 32 bit wide (CS2)