Thursday, June 18, 2009

Performance parameters

• Access time (Latency) – time taken to perform a read/write operation.
• Memory cycle time – access time plus any additional time required before a second access can commence (applicable to RAM)
• Transfer time – rate at which data can be transferred into or out of memory unit.

For RAM = 1/ (cycle time)

Non RAM TN = TA + N/R

TN = average time to read or write N bits
TA = average access time
N = number of bits
R = transfer rate in bits per second

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