Lecture17

Lecture17 - ProjectTips Wednesday,May25,2011 6:45PM May 26,...

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Project Tips Wednesday, May 25, 2011 6:45 PM May 26, 2011 Page 1
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May 26, 2011 Page 2
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Setup "0" Carry Propagation "1" Carry Propagation Multiplexer Sum Generation C o,k-1 C o,k+3 "0" "1" P,G Carry Vector Linear Carry Tuesday, May 24, 2011 10:51 AM May 26, 2011 Page 3
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May 26, 2011 Page 4
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Setup "0" Carry "1" Carry Multiplexer Sum Generation "0" "1" Setup "0" Carry "1" Carry Multiplexer Sum Generation "0" "1" Setup "0" Carry "1" Carry Multiplexer Sum Generation "0" "1" Setup "0" Carry "1" Carry Multiplexer Sum Generation "0" Bit 0-1 Bit 2-4 Bit 5-8 Bit 9-13 S 0-1 S 2-4 S 5-8 S 9-13 C i,0 (4) (5) (6) (7) (1) (1) (3) (4) (5) (6) Mux Sum S 14-19 (7) (8) Bit 14-19 (9) (3) Square Root Carry Select Tuesday, May 24, 2011 10:52 AM May 26, 2011 Page 5
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Square root select Linear select Ripple adder 20 40 N t p (in unit delays) 60 0 10 0 20 30 40 50 Adder Summary Thursday, May 26, 2011 10:19 AM May 26, 2011 Page 6
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Generate / Propagate j k k i j i j k k i j i P P P G G G : 1 : : : 1 : : 0:0 0 0 0 in GG C PP  1:0 ii i SP G  i i i i i i i i i i B A P P B A G G : : S 1 B 1 A 1 P 1 G 1 G 0:0 S 2 B 2 P 2 G 2 G 1:0 A 2 S 3 B 3 A 3 P 3 G 3 G 2:0 S 4 B 4 P 4 G 4 G 3:0 A 4 C in G 0 P 0 1: Bitwise PG logic 2: Group PG logic 3: Sum logic C 0 C 1 C 2 C 3 C out C 4 Tuesday, May 24, 2011 12:33 PM May 26, 2011 Page 7
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S 1 B 1 A 1 P 1 G 1 G 0:0 S 2 B 2 P 2 G 2 G 1:0 A 2 S 3 B 3 A 3 P 3 G 3 G 2:0 S 4 B 4 P 4 G 4 G 3:0 A 4 C in G 0 P 0 C 0 C 1 C 2 C 3 C out C 4 0 : 1 0 : i i i i G P G G Carry Ripple
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Lecture17 - ProjectTips Wednesday,May25,2011 6:45PM May 26,...

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