74174: Difference between revisions
Jump to navigation
Jump to search
Function table
(→74174) |
Tags: Mobile edit Mobile web edit |
||
| Line 47: | Line 47: | ||
|L||X||X||L | |L||X||X||L | ||
|- | |- | ||
|H|| | |H||↑||H||H | ||
|- | |- | ||
|H|| | |H||↑||L||L | ||
|- | |- | ||
|H||L||X||Q<sub>O</sub> | |H||L||X||Q<sub>O</sub> | ||
Revision as of 08:37, 5 May 2021
74174
Hex D flip-flop
Used as page register for memory paging in ZX Spectrum 128K
Pinout
|
CLEAR |
1 ° 16 |
VCC |
Function table
(each flip-flop)
| Inputs | Output | ||
|---|---|---|---|
| CLEAR | CLK | xD | xQ |
| L | X | X | L |
| H | ↑ | H | H |
| H | ↑ | L | L |
| H | L | X | QO |