MAX7219CNG+ datasheet by Maxim Integrated Products

MAX7219CNG+ Frequently Asked Questions (FAQs)

• What is the maximum clock frequency for the MAX7219CNG+?
  The maximum clock frequency for the MAX7219CNG+ is 10MHz.
• How do I initialize the MAX7219CNG+?
  To initialize the MAX7219CNG+, you need to send a shutdown command (0x0C, 0x01) followed by a display-test command (0x0F, 0x01) and then a scan-limit command (0x0B, 0x07) to set the number of digits to be displayed.
• What is the purpose of the RES pin on the MAX7219CNG+?
  The RES pin is an active-low reset input that resets the MAX7219CNG+ when pulled low. It is recommended to tie this pin to VCC through a 1kΩ resistor to prevent accidental resets.
• How do I adjust the brightness of the display connected to the MAX7219CNG+?
  The brightness of the display can be adjusted by sending a brightness-command (0x0A) followed by a brightness-value (0x00 to 0x0F) to the MAX7219CNG+.
• What is the maximum current rating for the segment outputs of the MAX7219CNG+?
  The maximum current rating for the segment outputs of the MAX7219CNG+ is 40mA per segment.