DocID026513 Rev 1

19/21

AN4541

Conclusion

21

7

Conclusion

STMicroelectronics EMIF devices include protection and filtering functions for SD card Ultra

High Speed applications.

Their electrical characteristics have been optimized to guarantee low clamping voltages in

order to protect the host driver, often exposed to ESD surges during card insertion and

removal.

Through careful PCB layout, it is possible to obtain the highest data rate transmission

allowable on the new SD3.01-compliant µSD or SD cards used by many portable devices.

The filtering capabilities of the EMIF devices can help the designer to limit the noise

generated during the read and write operations and improve EMI robustness, especially on

devices such as phones or tablets, which are particularly exposed to this issue.