Lec17_0316

Lec17_0316 - CS M51A/EE M16 Winter'05 Section 1 Logic...

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Y. He @ 02/14/11 CSM51A/EEM16-Sec.1 W’05 L17.1 CS M51A/EE M16 Winter’05 Section 1 Logic Design of Digital Systems Lecture 17 - Grande Finale Yutao He [email protected] 4532B Boelter Hall March 16 W’05
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Y. He @ 02/14/11 CSM51A/EEM16-Sec.1 W’05 L17.2 Outline Breaking News Chapter 12 Read-Only Memory (ROM) The Class Review The Final Review and Sneak Preview Course evaluation
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Y. He @ 02/14/11 CSM51A/EEM16-Sec.1 W’05 L17.3 Breaking News Good News No more homework No more projects No more quizzes No more midterms No more deadlines No more lectures Bad News No more jokes The Final on Friday
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Y. He @ 02/14/11 CSM51A/EEM16-Sec.1 W’05 L17.4 Read Only Memory (ROM) 2 n x k ROM Address Inputs E n k Outputs
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Y. He @ 02/14/11 CSM51A/EEM16-Sec.1 W’05 L17.5 ROM Implementation
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Y. He @ 02/14/11 CSM51A/EEM16-Sec.1 W’05 L17.6 Types of ROMs Mask-programmed ROM Programmable ROM (PROM) Erasable Programmable ROM (EPROM) Electrically Erasable Programmed ROM (E 2 PROM) (aka flash memory )
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Y. He @ 02/14/11 CSM51A/EEM16-Sec.1 W’05 L17.7 Design Comb. Systems Using ROMs Basic facts: a combinational circuit “stores” the entire truth table of switching functions a non-volatile memory: * the stored data won’t disappear with the power off Basic Steps: 1. Obtain the truth table 2. Decide size of ROMs (n, k) 3. Program (“copy”) the entire truth table into the ROM 4. Enable the ROM
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Y. He @ 02/14/11 CSM51A/EEM16-Sec.1 W’05 L17.8 Example: Design A 1-bit Full Adder x 0 0 0 0 1 1 1 1 y 0 0 1 1 0 0 1 1 Cin 0 1 0 1 0 1 0 1 S 0 1 1 0 1 0 0 1 Cout 0 0 0 1 0 1 1 1 Need one 8 x 2 ROM 1-Bit Full Adder x y carry_in sum carry-out
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Y. He @ 02/14/11 CSM51A/EEM16-Sec.1 W’05 L17.9 A 1-bit Full Adder (Cont’d) x 0 0 0 0 1 1 1 1 y 0 0 1 1 0 0 1 1 Cin 0 1 0 1 0 1 0 1 S Cout 0 1 1 0 1 0 0 1 0 0 0 1 0 1 1 1 8 x 2 ROM E 2 1 0 EN x y Cin Cout S = 1 0 1 1 0 1 0 0 1 0 0 0 1 0 1 1 1
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Y. He @ 02/14/11
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This note was uploaded on 02/14/2011 for the course CS M51A taught by Professor Ercegovac during the Winter '07 term at UCLA.

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Lec17_0316 - CS M51A/EE M16 Winter'05 Section 1 Logic...

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