SD Card Interface

R2026b

Specify the SD card interface used for MAT-file logging on supported hardware

Since R2026b

Model Configuration Pane: Hardware Implementation / Hardware board settings / Target hardware resources / SPI properties

Description

Use this parameter to control how the application accesses the SD card for MAT-file logging. This parameter allows you to choose between using the on-board SD card hardware or an external SD card module connected through serial peripheral interface (SPI).

The on-board SD card interface uses the fixed secure digital input/output (SDIO) connection on Teensy 4.1 hardware whereas an external SD card module uses the SPI peripheral.

Dependencies

  • To enable this parameter, set Hardware board to Teensy 4.1 (Arduino Compatible).

    • When you set SD Card Interface to On-board SD Card Interface, the SD Card SPI CS Pin parameter is read-only. The chip-select pin uses a fixed internal value and cannot be modified.

    • When you set SD Card Interface to External SD Card Module, you can specify the chip select pin used by the external SD card module in the SD Card SPI CS Pin parameter. Refer to the pin mapping table for the corresponding block to determine the correct chip select pin for your target hardware.

Settings

On-board SD Card Interface | External SD Card Module

Configure the SD Card Interface parameter based on the SD card hardware available on your Teensy board. Teensy 4.1 supports both on‑board and external SD card interfaces while Teensy 4.0 supports external SD card modules only. When using an external SD card module, make sure that the SD Card SPI CS pin matches the wiring of your target hardware.

Programmatic Use

No programmatic use is available.

Version History

Introduced in R2026b