Fujitsu F2MC-8FX Series Note d'application - Page 7

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Fujitsu F2MC-8FX Series Note d'application
DBG pin operation V1.0
Chapter 4 Precautions in using DBG pin

4 Precautions in using DBG pin

1. The peripheral circuit connected to DBG pin shouldn't influence the 1-line UART
communication if using BGM Adapter to do debug. Please refer to figure 2-1 when design
user board.
2. It is recommended that set P12 as input pin or output low in user code when doing debug.
Do not set P12 to output high. Because if set P12 output high, DBG pin will output high when
target MCU runs in free-run mode. And if target board is connected with BGM adapter in this
condition, a large current will run through DBG pin when BGM adapter transports bit "0" with
1-line UART pin.
MCU-AN-500009-E-10 – Page 7