Motorola MCF5282 Test Signals, Debug Data DDATA30, Processor Status Outputs PST30, Test Test

Models: MCF5282 MCF5281

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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].

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

 

 

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.

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MCF5282 User’s Manual

MOTOROLA

Page 312
Image 312
Motorola MCF5282 Test Signals, Debug Data DDATA30, Processor Status Outputs PST30, Test Test, Processor Status Encoding