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by
gijgiefewf orkrktr
6 years ago
129
Memory technologies
Verschillende geheugentechnologieën spelen een cruciale rol in moderne computerarchitecturen. DRAM is kostenefficiënt per bit in vergelijking met SRAM en maakt gebruik van één transistor per bit.
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by Настя Белка
Memory technologies
Flash Memory
Bits slijten bij write instructies, dus is er een controller die zorgt dat alle bits even vaak worden gebruikt.
Wear Leveling
Electrically Erasble Programmable Read-Only Memory
SRAM Technology (Static Random Access Memory)
Zolang er stroom wordt toegevoerd, kan informatie bewaard blijven.
6 tot 8 Transistors
Access Time ≈ Cycle Time
Integrated circuits
Disk Memory
Average Rotational Latency = Rotations / RPM Uitkomst in ms.
Wachten tot de juiste sector boven de head is. = rotational latency.
Seek = read/write head boven de juiste track plaatsen.
Tracks worden verdeeld in sectors.
Schijf wordt verdeeld in tracks.
Read & Write door arm
5400 tot 15000 revolutions per minuut
Magnetische harde schijf
DRAM Technology (Dynamic Random Access Memory)
Wordt vernieuwd per rij, daarna volgt een
Per bit goedkoper dan SRAM
1 Transistor per bit of storage