Mata Kuliah Teknik Digital 7 PENCACAH Pencacah Reguler

Mata Kuliah Teknik Digital 7. PENCACAH

Pencacah Reguler Tabel 7. 1. Tabel keadaan pencacah biner berurutan. A B C D A+ B+ C+ D+ 0 0 1 1 0 0 0 0 1 1 0 1 0 0 0 1 1 0 0 A B C D 0 0 0 0 1 0 0 1 0 0 1 0 1 1 0 0 0 0 1 1 0 1 0 1 1 1 1 0 0 0 1

Pencacah dengan flip-flop T AB C Pencacah Naik. A 0 0 1 1 B 0 0 1 1 C 0 1 0 1 A + B+ C+ 0 0 1 1 1 0 0 1 1 1 0 00 01 11 1 1 0 TA T B T C 0 0 1 0 1 1 0 0 1 1 1 1 1 TA= BC AB C 00 01 11 10 1 1 0 1 TB= C C T B T C 10 A T B A TC= 1

Pencacah dengan flip-flop T AB Pencacah Turun. A 0 0 1 1 B 0 0 1 1 C 0 1 0 1 A + B+ C+ 1 1 1 0 0 0 1 1 1 0 0 1 1 1 0 C TA T B T C 1 1 1 0 0 1 00 0 01 11 1 TB= BC AB C 0 TC= 1 00 01 11 10 1 1 1 TB= C C T B T C 10 A T B A

Pencacah dengan flip-flop T Pencacah Naik-Turun Up/Dn= M M= 0 Down M= 1 Up Up/Dn= M C P T B T C TC = P A T B TB= MPC + MPC A TA= MPBC + MPBC

Pencacah tak beraturan A B C A + B + C+ BC BC 000 0 1 1 A 0 1 00 1 1 010 1 0 0 01 x 011 0 11 x 100 1 AB AB 10 x 00 01 11 10 C C 1 00 1 x 0 0 0 C+ 1 1 x x 1 110 1 1 1 TA -= BC + BC = B+C BC A 0 00 A 0 1 01 x 11 1 x 10 x 00 01 1 11 + Ax 1 x x TB= AC 1 10 AB C B 0+ 1 00 1 01 1 x 1 11 10 x 1 TC= B + C

Pencacah tak beraturan: flip-flop T, Diagram Rangkaian B C P T T C TC= P(B + C) A T B TB= P(A + C) A TA= P(B + C)

Diagram waktu pencacah irreguler P A 0 0 0 1 1 0 0 0 1 0 B 0 C 0 TA TB TC 0

Pencacah dengan flip-flop RS ABC 000 001 010 011 100 101 110 111 A + B + C+ R A S A R B S B 0 1 1 x 0 0 1 - - x x 1 0 0 0 1 1 0 0 1 0 x 0 0 x 1 0 x 0 0 0 1 0 x 0 - - x x x x RC S C 0 1 x x 0 x 1 0 0 1 1 0 x x Q 0 0 1 1 Q+ 0 1 R x 0 1 0 S 0 1 0 x

Peta-K Pencacah dengan RS A BC 00 01 11 10 A 0 1 x 0 x x x 1 x x x SA RA SA = BC 1 1 x x RA= C BC 0 00 1 01 x 1 0 x 1 x x A BC 0 00 1 01 x 1 1 11 x x x 11 x 10 x SB RB SC R C SB = AB RB = BC SC = BC (c) AB 0 1 x 1 1 x x x RC = C AB C 00 01 11 10 0 0 1 x 1 0 x 0 0 1 0 x 1 1 x 0 1 x 0 A+ C AB 00 01 11 10 B+ C 00 01 11 C+ 10

Pencacah dengan flip-flop JK Peta Keadaan Berikut ABC 000 001 010 011 100 101 110 111 A+B+C+ JA KA JB KB JC KC 0 1 1 0 x 1 x - - x x x 1 0 0 1 x x 1 0 x 0 1 0 0 x x 0 x 1 1 0 1 x 0 0 x 1 x 0 0 0 x 1 0 x x 1 - - x x x Q 0 0 1 1 Q+ 0 1 J 0 1 x x K x x 1 0

Peta-K Pencacah dengan JK A BC 00 01 11 10 A 0 x 1 x x 0 x x 1 1 1 BC 0 00 1 01 x x x 11 x 10 x x x JA KA JA = BC KA= C JB 0 x x 1 x x KB JB = A A BC 0 00 1 01 x JC KB = C 1 1 x 0 x x 1 11 x x 10 x KC JC = B 1 x x x AB KC = 1 AB C 00 01 11 10 0 0 1 x 1 0 x 0 0 1 0 x 1 1 x 0 1 x 0 A+ C AB 00 01 11 10 B+ C 00 01 11 C+ 10

Peta-K Pencacah dengan ff D AB C 00 AB 01 11 10 0 0 1 x 1 0 x 0 0 1 0 x 1 1 x 0 1 x 0 A+ DA= AC + BC C AB 00 01 11 10 B+ DB= A B + AC C 00 01 11 C+ DC = B C 10

Pencacah dalam Rangkaian Terpadu Input A 14 QA 13 QD 12 GND 10 11 QA Q D >A R 0(1) R 0(2) R 0(1) QC QB 9 Input B 8 Q C QB R 0(1) R 0(2) QD QC QB QA H H L L L x Count x L Count B< R 0(2) NC VCC NC NC NC K >CK J R 0(1) >CK 7 K 6 J 5 >CK 4 K 3 J 2 J >CK K 1 Q Q