Ausdauer, 8 bits = 1 byte. 512 Mbits = 64 MB.
Memory chips can be organized to transfer as many bits as you like per clock cycle (1,2,4,8,16,32, etc.) When a chip is organized 2+ bits wide, the memory cells are divided into rows which are addressed simlutaneously.
The wider the bus width, the faster data is transferred -- but at the cost of a higher pin count. 64MB CF cards are arranged with the memory divided into 16 parallel 32Mbit sections. It is also possible to create a 64MB CF card using two 256Mbit chips, each divided into 8 parallel 32Mbit sections, 16 parallel 16Mbit sections, etc.
Craig |