Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 用户手册

Freescale Semiconductor

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— Normal: change of flow (COF) PC information is stored (see

) for change of

flow definition.

— Loop1: same as Normal but inhibits consecutive duplicate source address entries
— Detail: address and data for all cycles except free cycles and opcode fetches are stored
— Pure PC: All program counter addresses are stored.

•

4-stage state sequencer for trace buffer control
— Tracing session trigger linked to Final State of state sequencer
— Begin, End, and Mid alignment of tracing to trigger

The S12XDBG module can be used in all MCU functional modes.

During BDM hardware accesses and whilst the BDM module is active, CPU12X monitoring is disabled.
Thus breakpoints, comparators, and CPU12X bus tracing are disabled . When the CPU12X enters active
BDM Mode through a BACKGROUND command, with the S12XDBG module armed, the S12XDBG
remains armed.

The S12XDBG module tracing is disabled if the MCU is secure. However, breakpoints can still be
generated if the MCU is secure.

x

x

1

Yes

Yes

Yes

No

0

0

0

Yes

Only SWI

Yes

Yes

0

1

0

               Active BDM not possible when not enabled

1

0

0

Yes

Yes

Yes

Yes

1

1

0

No

No

No

No