FAQs

Frequently Asked Questions

Open questions are not welcome! 🌱

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How long does it takes for a full update of the Matrix? 🚧

I'll measure this later...

How does the latch functionality on the MY9221 chip work? 🏁

You must send the right data to the MY9221 chip and latch this. It means you will transmit the data from the shift register to the PWM generator. With this function you activate the data and the LEDs switching on or something like this.

How does the daisy chain mechanism work? 🏁

This is the right sequence:

• sending the first 208 bit (16 bit command and 12x16=192 bit data)
  • 1st MY9221 takes the data
  • 2nd MY9221 takes nothing
• sending the second 208 bit (FIFO behavior)
  • 1st MY9221 takes the 2nd sended data
  • 2nd MY9221 takes the 1st sended data

Is it possible to change only one pixel in the matrix? 🏁

No, this is not possible. Because the MY9221 chips need everytime a full data transmission. You have to send the 16 bit command and twelve times the 16 bit data. So you have to update every time the whole chips and matrix.

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Thank you for your help.