SPI lines can sometimes contain pull-up resistors. Here is when to use pull-up resistors on SPI lines.
UART vs. SPI vs. I2C: Routing & Layout Guidelines, Blogs
Understanding the SPI Bus with NI LabVIEW - NI
Pull-up required on NRST line? - STMicroelectronics Community
How to Build Point-to-Point Serial and Power Chains
SPI vs. I2C: How to Choose the Best Protocol for Your Memory Chips, Zach Peterson, Blog
Communication Protocol - SPI - Power's Wiki
I2C communication, pull up resistor in I2C, I2C Bus Capacitance
Are Pull-up Resistors Needed on Push-Pull Buses?
Pull-up Resistors and Pull-down Resistors Explained
I2C communication, pull up resistor in I2C, I2C Bus Capacitance
SPI Basics — Rheingold Heavy
Pull-up Resistors and Pull-down Resistors Explained
Multiple MCP4922 SPI DACs on an Arduino - ua726