TCM4 / TCM4-BLE MultiFreq card reader
JAN 2021
USB interface
TCM4 connects to the host device by different types of USB protocols depending on the configuration:
•
USB HID Keyboard Qwerty or Azerty
•
USB CDC Serial Emulator.
Operation
2.4.1
Memory view
The memory is divided into 3 sections as shown in the following diagram:
Bootloader
(200 Kbytes)
Application
(400 Kbytes)
Storage
(400 Kbytes)
•
Bootloader: The bootloader is the entry point for the firmware after a TCM4 power up or a reset.
Only the bootloader provides functions for programming new firmware. This means that the
bootloader must be entered to program a new firmware.
•
Application: TCM4 application.
•
Storage: Storage area, where a new firmware file and the configuration file are stored. It is
accessible from host computer through USB mass storage in bootloader mode.
