I am writing to inquire about how to interface the ST4SI2M0020TPIFW eSIM monolithic IC with a microcontroller .
I understand that the ST4SI2M0020TPIFW does not have any UART, SPI, or I2C pins. However, it is a monolithic IC that is designed to be integrated into a larger system. The system would then provide the necessary communication interface to the microcontroller.
The IC does not have any UART, SPI, or I2C pins, so I am wondering if it is possible to implement a custom communication protocol using the GPIO pins.
I am not aware of any dedicated eSIM communication drivers that are compatible with the ST4SI2M0020TPIFW.
I would like to request assistance in interfacing the ST4SI2M0020TPIFW with any microcontroller like STM32 ,Arduino, ESP32 and Raspberry pi zero W.
However, I am not sure how to proceed with this. I would appreciate any guidance you can provide.
From the ST product web page... "The device is based on the ST33G1M2M" and "ST33GxxxM ... offers a serial communication interface fully compatible with the ISO/IEC 7816-3 standard (T=0, T=1) and a single-wire protocol (SWP) interface for communication with a near field communication (NFC) router in SIM/NFC applications. An SPI Master/Slave interface is also available for communication in non-SIM applications."
This is the only one listed eval. board: https://www.st.com/en/evaluation-tools/b-l462e-cell1.html
Hope this answers the question how to interface this thing to a STM32.