Memory ROM, PROM, EEPROM

1. MemoryROM, PROM, EEPROM Mano and Kime Section 6-6

2. Read-Only Memory

3. An example of implementing a function using a ROM

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 Programming Erasing

7. EPROMs

8. EPROM 2716 2732 1 24 A7 Vcc 2 23 A6 A8 3 22 A5 A9 4 21 Vpp A11 A4 __ __ 5 20 A3 Vpp OE OE / 6 19 A2 A10 __ 7 18 CE A1 8 17 A0 D7 9 16 D0 D6 10 15 D1 D5 11 14 D2 D4 12 13 GND D3 27xx EPROM Pinouts

9. 27512 27256 27128 2764 EPROM 2764 27128 27256 27512 1 28 A15 Vpp Vpp Vpp Vcc ____ ____ 2 27 PGM PGM A14 A14 A12 3 26 A13 A13 NC A13 A7 4 25 A6 A8 5 24 A5 A9 6 23 A4 A11 __ __ __ __ 7 22 Vpp A3 OE OE OE OE / 8 21 A2 A10 __ 9 20 A1 CE 10 19 A0 D7 11 18 D0 D6 12 17 D1 D5 13 16 D2 D4 14 15 GND D3 27xx EPROM Pinouts

10. Xicor X28C010 128K x 8 E2PROM

11. Xicor X28C010 128K x 8 E2PROM 10 ms