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Tellers Voorstelling van een synchroon sequentieel ... - Docweb

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We zien dat na toestand A toestand B komt, na B 4, na C D, na D 4, na E F en na F 0.<br />

Dit kunnen we beter uitzetten in <strong>een</strong> toestandsdiagram. (ziefiguur 11.1)<br />

<strong>Tellers</strong><br />

S0<br />

S9<br />

SYNCHRONE DECADE TELLER<br />

clk QD QC QB QA QDT QCT QBT QAT DJ DK CJ CK BJ BK AJ AK<br />

0 0 0 0 0 0 0 0 1 0 x 0 x 0 x 1 x<br />

1 0 0 0 1 0 0 1 0 0 x 0 x 1 x x 1<br />

2 0 0 1 0 0 0 1 1 0 x 0 x x 0 1 x<br />

3 0 0 1 1 0 1 0 0 0 x 1 x x 1 x 1<br />

4 0 1 0 0 0 1 0 1 0 x x 0 0 x 1 x<br />

5 0 1 0 1 0 1 1 0 0 x x 0 1 x x 1<br />

6 0 1 1 0 0 1 1 1 0 x x 0 x 0 1 x<br />

7 0 1 1 1 1 0 0 0 1 x x 1 x 1 x 1<br />

8 1 0 0 0 1 0 0 1 x 0 0 x 0 x 1 x<br />

9 1 0 0 1 0 0 0 0 x 1 0 x 0 x x 1<br />

A 1 0 1 0 1 0 1 1 0 0 0 0 0 0 1 1<br />

B 1 0 1 1 0 1 0 0 0 1 1 1 0 1 1 1<br />

C 1 1 0 0 1 1 0 1 0 0 0 0 0 0 1 1<br />

D 1 1 0 1 0 1 0 0 0 1 0 0 0 1 1 1<br />

E 1 1 1 0 1 1 1 1 0 0 0 0 0 0 1 1<br />

F 1 1 1 1 0 0 0 0 1 1 1 1 0 1 1 1<br />

S1 S2 S3<br />

S8<br />

SF SE<br />

S7<br />

'160 Decade 4-bit counter with asynchrounous clear<br />

'162 Decade 4-bit counter with synchrounous clear<br />

'192 Decade 4-bit up/down counter<br />

Figuur 11.1<br />

S6<br />

- 11 -<br />

S4<br />

S5<br />

SB SA<br />

SD SC<br />

DIGITALE TECHNIEKEN

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