May 17, 2016 · Do we need pull-up resistors on SPI signals (since the SPI port is push-pull configuration)? The only time pins will be floating is until the microcontroller get its power and can set pins as outputs. So should I need to use pull-up resistors or what will happen if I don't use any pull-up resistors in my design?

There’s a diode going into each Tx line, and the whole thing is gently pulled up by a pull-up resistor. This configuration means that a transmit pin can pull down the line, and the resistor will pull it back up.

Sep 6, 2016 · It requires an external pull-up resistor for correct operation. As an external pull-up resistor, you can use an internal pull-up of the MK10DX256VLK7, that could be set on UART0_RxD (pin #35) operating in input mode.

This module begins our discussion of SPI basics by introducing the theory, structure and signaling of the SPI serial communications bus.

Oct 11, 2022 · We can easily do this by using what are commonly called Pull-up Resistors and Pull-down Resistors to give the input pin a defined default state, even if the switch is open, closed or there is nothing is connected to it.

Serial Data (SDL) and Serial Clock (SCL) are the two signal connections used for communication in the I 2 C protocol. Both SDL and SCL are open-drain lines, meaning that each pin requires a pull-up resistor to bring the signal high when it is not being driven low by the I …

Dec 21, 2013 · SPI bus uses classic (assuming CMOS) buffer at its output, where PMOS transistor pulls the output up and NMOS transistor pulls the output down. In CMOS digital …

May 5, 2013 · The reason for pull-up resistors is that when a line is not being driven specifically high or low the line is floating, just picking up the electrical noise in the environment. In these cases you would get spurious signals from your connection, so a pull-up/down resistor is added.

May 22, 2025 · The OSI (Open Systems Interconnection) Model is a set of rules that explains how different computer systems communicate over a network. OSI Model was developed by the International Organization for Standardization (ISO). The OSI Model consists of 7 layers and each layer has specific functions and responsibilities. This layered approach makes it easier for …

Jan 10, 2024 · Pull-up resistors can be placed on an SPI bus to tie signals to a logic level during startup.