8Mbit parallel NOR Flash in a 32-PLCC footprint
The SST49LF080A-33-4C-NHE is an 8Mbit parallel NOR Flash memory from Microchip Technology's SST49 series, organized as 1M x 8 bits and accessed through a parallel interface at 33 MHz.
Speed and timing — what the numbers mean for the bus
The 120 ns access time is the window from address valid to data valid on the bus — a 33 MHz clock cycles every 30 ns, so the part needs four clock cycles to return data on a read, which the memory controller must budget into its wait-state configuration. Write cycle time is 20 µs per word or page — this is the time the part takes to program a location after the write command; for a firmware update writing 1 Mbyte sequentially, the raw write time is about 2.6 seconds before considering erase overhead.