User's Manual

MB1396 hardware
UM2358-1
4
MB1396 hardware
The PCB (printed circuit board) of the motherboard is usually connected via USB to the PC.
The embedded firmware controls the STM32 MCU that operates the ST25R3916B via the
extension connectors.
Both boards are powered by the 5 V supply of the USB bus. An LDO converts this voltage
down to 3.3 V to supply the microcontroller and the ST25R3916B. The extension board is
provided with both 3.3 and 5 V supplies, it is possible to select one of them.
A green LED close to the motherboard micro-USB plug indicates when the board is
powered.
4.1
MB1396 board layout
Figure 3. MB1396 [-B] board (top view)
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0 ꢁꢂꢁꢂ9ꢃ
1. Available only on dedicated demonstration only edition.
8/31
UM235x Rev 02