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Memory ROM, PROM, EEPROM Mano and Kime Section 6-6.

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Presentation on theme: "Memory ROM, PROM, EEPROM Mano and Kime Section 6-6."— Presentation transcript:

1 Memory ROM, PROM, EEPROM Mano and Kime Section 6-6

2 Read-Only Memory

3 An example of implementing a function using a ROM

4

5 EPROMs, EEPROMs and Flash Memory EPROM –Erasable Programmable Read-Only Memory –Erase with ultraviolet light EEPROM –Electrically-Erasable Programmable Read-Only Memory Flash Memory –Electrically-Erasable in bulk

6 Floating-gate avalanche MOS ProgrammingErasing

7 EPROMs

8 27xx EPROM Pinouts 1 2 3 4 5 6 7 9 10 11 12 8 19 20 17 18 15 16 13 14 21 22 23 24 GND Vcc A0 D0 D1 D2 D7 D6 D5 D4 D3 A10 A1 A2 A3 A4 A5 A6 A7 A9 A8 Vpp A11 27162732 __ OE Vpp __ OE / CE __ EPROM

9 27xx EPROM Pinouts

10 Xicor X28C010 128K x 8 E 2 PROM

11 10 ms

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