Programming instructions

TTL
Multisim Component Reference Guide 6-84 ni.com
6.4.14574xx69 (Dual 4-bit Binary Counter)
Counter number one has two sections - counter A (divide-by-2 section) and counter B, C, D
(divide-by-8 section). Counter number two has only divide-by-sixteen section.
4-Bit counter truth table:
6.4.14674xx72 (AND-gated JK MS-SLV FF (pre, clr))
This device is equipped with an active-low pre and active-low clr. Therefore, the flip-flop
begins accepting input from the JK input when the preset and clear are both high (hence
AND-gated).
AND-gated JK flip-flop truth table:
1CLR 2CLR 1QA 1QB 1QC 1QD 2QA 2QB 2QC 2QD
1 1 COUNT COUNT
1 0 COUNT 0000
0 1 0000COUNT
0 0 00000000
PRE CLR CLK J K Q Q
01XXX10
10XXX01
00XXXUNSTABLE
11· 00Q0Q0
11· 1010
11· 0101
1 1 · 1 1 Toggle
· = triggers on pulse (level sensitive)
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