MAX7219EWG+ datasheet by Maxim Integrated Products

MAX7219EWG+ Frequently Asked Questions (FAQs)

• What is the maximum clock frequency for the MAX7219EWG+?
  The maximum clock frequency for the MAX7219EWG+ is 10MHz.
• How do I initialize the MAX7219EWG+?
  The MAX7219EWG+ can be initialized by sending a shutdown command (0x0C) followed by a display test command (0x0F) and then setting the brightness and scan limit registers.
• What is the purpose of the No-op command (0x00) in the MAX7219EWG+?
  The No-op command (0x00) is used to synchronize the data transmission and can be used to insert a delay between commands.
• How do I adjust the brightness of the display using the MAX7219EWG+?
  The brightness of the display can be adjusted by writing a value between 0x00 (minimum brightness) and 0x0F (maximum brightness) to the brightness register (0x0A).
• What is the maximum number of digits that can be driven by the MAX7219EWG+?
  The MAX7219EWG+ can drive up to 8 digits.