Hi all!
I currently have a project with a HEF4059 divide-by-n counter.
Datasheet:
https://www.electro-tech-online.com/custompdfs/2003/08/HEF4059B_CNV_3.pdf
I'm using it in mode 8, which allows a division of max. 21327.
My division # is 21043.
Here is my calculation:
21043 / 8 = 2630 remainder 3
=======================
n = 8 ( 1000 x 1 + 100 x 15 + 10 x 13 + 1 x 0 + 3)
===================================
Code:
____3___ 1 ____0______ ______13______ ______15_______
J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J11 J12 J13 J14 J15 J16
1 1 0 1 0 0 0 0 1 0 1 1 1 1 1 1
Mode 8:
LE = L ; Ka = L ; Kb = L ; Kc = H
I'm also using an reset curcuit to start the divider in master-preset:
Code:
____
|
---
--- 1uF
|_______ to a HEF4025 NOR gate wired as inverter ___ Kc 4059
|
R 1k
R
_|_
The problem is that the output of the 4059 is always low.
I checked:
* supply voltage - OK
* pin voltages high/low - OK
I don't have an HF freq. counter, but the clock input of the 4059 shows a voltage of half of the supply voltage, so I assume there is a clock signal.
My multi-meter says the frequency is to high to be measured. If the input would be DC, it would say 0Hz.
BTW, the clock is 1.2288 MHz
Is there anything wrong with my calculation and/or the wireing of the 4059 ?
Thank you all very much for any tips!! Very much appreciated!!
Best regards from Austria,
Hannes.