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W10_18_IO2_Periph - 18 I/O and Peripherals Part 2...

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18 I/O and Peripherals Part 2: Peripherals CSC 230 1
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Other storage ROM Read Only Memory Î keeps information without power on Î write only once read only write only once, read only EPROM – EEPROM reprogrammable ROM (only a few times) FLASH memory - keeps information when power is off low power consumption - low power consumption - great density - low cost -not very fast not very fast - read single cell, write entire block FLASH cards FLASH d i es 2 FLASH drives
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Speed, Size, Cost I t / d Control CPU Registers Smaller Faster Upper level Inst./operand Prog./compiler (1-8B) Block On-chip Cache Second Level Cache(SRAM) Cache controller (8-128B Block Cache controller (8 128B) Main Memory (DRAM) Pages Cache controller (8-128B) Secondary Memory (DISK) OS (512 - 4KB) 3 Larger Slower Lower level
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Secondary Storage: Hard Disks Sector 0 track 0 Sector 3, track n Sector 0, track 1 Sector 0, track 0 Organization of one surface of a disk. 4
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Secondary Storage: Hard Disks thin magnetic film in a layer on each side
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