Article Details

ID: 3520
Case Type: faq
Category: Architecture
Related To: Configuration/Programming
Family: iCE40

Search Answer Database

How to calculate the internal resistor value of SPI_SS_B pin for iCE40 devices?

To calculate the internal resistor value of SPI_SS_B pin divide the IPU value with the VCCIO value. This value of IPU and VCCIO are provided in the Data Sheet under "DC Electrical Characteristics" section. It is always recommended putting the external pull-up resistor on SPI_SS_B pin. Please refer the documentation part for datasheet of iCE40 LP/HX/LM in this direct link:
http://www.latticesemi.com/en/Products/FPGAandCPLD/iCE40.aspx

Like most websites, we use cookies and similar technologies to enhance your user experience. We also allow third parties to place cookies on our website. By continuing to use this website you consent to the use of cookies as described in our Cookie Policy.