Thanks for the response
I found the solution myself.
I used ATMEGA88 microcontroller to convert “A”, “B”, “C”, “D” address signals to DIN (on C line) and DCK (on A line) signals for 32020 chip.
ATMEGA88 runs on an internal RC oscillator, so no external components are required.
A very simple code was sufficient for this purpose. On port C, which is configured as input, we read “A”, “B”, “C”, “D” address. “C_din” and “A_dck” are pins of D port configured as output. “B_rck” is not used and always in zero state.
Although it is quite possible to use an Arduino nano.
The image is completely clear and stable.