Functions Of Dbg Pin; Dbg Pin Hardware Connection (Debug Mode); Performance In Debug Mode; Performance In Free-Run Mode - Fujitsu MB95210H Series Application Note

DBG pin operation V1.0
Chapter 2 Functions of DBG pin

2 Functions of DBG pin

THE FUNCTIONS OF DBG PIN IN DIFFERENT MODES

2.1 DBG pin hardware connection (debug mode)

Figure 2-1 DBG pin hardware connection in debug mode

2.2 Performance in debug mode

If target MCU enter into debug mode, DBG pin performs as 1-line UART pin. To make sure
the real time communication with BGM Adapter, other functions in this pin are disabled.
P12 function is disabled. Any operation for P12 in user code has no effective.
EC0 function is also disabled in this pin. But there is another pin can be used as EC0 pin.
Write "1" to SYSC [EC0SL] can select P04/EC0 pin as external counter clock input. But do
not set EC0 input and HCLK1 input from P04 pin at the same time.

2.3 Performance in free-run mode

If target MCU enter into free-run mode, 1-line UART function is disabled. P12/EC0 functions
can be used by user code. But the DBG pin can not be set as 1-line UART pin by user code.
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