Why do some SPI circuits have resistors between Vdd and CS, some have resistors forming voltage dividers on certain pins, and others have no bus resistors at all? Using three variations of
TXS02612: TXS02612 - Logic forum - Logic - TI E2E support forums
DK-TM4C123G SD-card code on a TM4C123G - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums
pcb design - Role of resistors in SCLK-CS-DI-DOUT lines in SD card circuit - Electrical Engineering Stack Exchange
SPI Basics — Rheingold Heavy
SD card: confused by schematics - Raspberry Pi Forums
SD Card Module - Pull-Up Resistors and Decoupling Capacitor? - Storage - Arduino Forum
Schematics: SD Card | Details | Hackaday.io
Electronics — Light Plate Apparatus 0.9 documentation
Managing mixed voltage interfaces between portable devices and memory cards - Embedded.com
SPI SD Card - Raspberry Pi Forums
SD card: confused by schematics - Raspberry Pi Forums
SD card via SPI: pull-up resistors or dedicated IC? - Electrical Engineering Stack Exchange
NetBurner 3.4.0g: Flash Card Hardware Interface Design
AVR SD Card Initialization Tutorial Part 1
Cant get a MicroSD card to work. (IDFGH-5170) · Issue #965 · espressif/esp-idf · GitHub
SDFAT initialisation failure - Troubleshooting - Particle
SD card via SPI: pull-up resistors or dedicated IC? - Electrical Engineering Stack Exchange
AM3358: Device tree file enables some pull-ups (or pull-downs) on pins that already has external pull-ups connected to them - Processors forum - Processors - TI E2E support forums
Why the pullups on SD card pins? - Storage - Arduino Forum
Adding an SD card reader to my 6502 computer – Mike's Software Blog
microcontroller - SD card socket just need to wire with pull-up resistors? - Electrical Engineering Stack Exchange
FPGA Implementation of a SD Card Controller using SPI communication
PIC32MX: Interfacing to a Secure Digital (SD) Flash Card - Northwestern Mechatronics Wiki
microcontroller - Micro SD card power circuit failure - Electrical Engineering Stack Exchange
