Precautions On Using Dbg Pin - Fujitsu MB95200H/210H Series Application Note

DBG pin operation V1.0
Chapter 4 Precautions on using DBG pin

4 Precautions on using DBG pin

This chapter describes precautions on using DBG pin.
1. The peripheral circuit connected to DBG pin shouldn't affect 1-line UART communication
when using BGM Adapter for debugging. Please refer to Figure 2-1 when designing user
board.
2. It is recommended that P12 is set as input pin or output low level in user code instead of
output high level when debugging. DBG pin will be set as output high when target MCU runs
in free-run mode, if P12 is set as output high level. A large current will pass through DBG pin
when BGM adapter transfer "0" with 1-line UART pin if target board is connected to BGM
adapter on this condition.
MCU-AN-500009-E-10 – Page 7