Motorola MCF5281 사용자 설명서

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MCF5282 User’s Manual
MOTOROLA
 
MCF5282 External Signals  
14.2.14.7  Debug Data (DDATA[3:0])
Debug data signals (DDATA[3:0]) display captured processor addresses, data and
breakpoint status. 
These pins can also be configured as GPIO PDD[7:4].
14.2.14.8  Processor Status Outputs (PST[3:0])
PST[3:0] outputs indicate core status, as shown below in Table 14-7. Debug mode timing
is synchronous with the processor clock; status is unrelated to the current bus transfer.  
These pins can also be configured as GPIO PDD[3:0]. 
14.2.15  Test Signals
14.2.15.1  Test (TEST)
This input signal is reserved for factory testing only and should be connected to VSS to
prevent unintentional activation of test functions.
Table 14-7. Processor Status Encoding
PST[3:0]
Definition
0000
Continue execution
0001
Begin execution of an instruction
0010
Reserved
0011
Entry into user mode
0100
Begin execution of PULSE and WDDATA 
instruction
0101
Begin execution of taken branch
0110
Reserved
0111
Begin execution of RTE instruction
1000
Begin one-byte transfer on DDATA
1001
Begin two-byte transfer on DDATA
1010
Begin three-byte transfer on DDATA
1011
Begin four-byte transfer on DDATA
1100
Exception Processing
1101
Emulator-Mode Exception Processing
1110
Processor is stopped
1111
Processor is halted