Debug module (DM) |
UM0470 |
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4 Debug module (DM)
4.1Introduction
The Debug Module (DM) allows the developer to perform certain debugging tasks without using an emulator. For example, the DM can interrupt the MCU to break infinite loops or output the core context (stack) at a given point. The DM is mainly used for in-circuit debugging.
4.2Main features
●Two conditional breakpoints (break on instruction fetch, data read or write, stack access...)
●Software breakpoint control
●Step mode
●External Stall capability on WOTF command in SWIM mode
●Watchdog and peripherals control
●DM Version identification capability
●Interrupt Vector Table selection
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Doc ID 14024 Rev 3 |
UM0470 |
Debug module (DM) |
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Figure 11. Debug module block diagram
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WATCHDOG |
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Debug Module (DM) |
WATCHDOG CONTROL |
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DM REGISTERS |
LOGIC |
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READ/WRITE |
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LOGIC |
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DM_BK1 DM_BK2 |
- |
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SWIM |
SWIM |
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- |
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BC2 |
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SWBKE |
SWBKF |
DM |
BC1 |
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BREAKPOINT |
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enable bit |
BC0 |
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EMU/DMA |
flag |
LOGIC |
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BIR |
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interface |
. |
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SOFTWARE |
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BIW |
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BREAK |
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- |
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RESET |
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DM_CSR1 |
DM_CR1 |
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STE STF RST BRW BK2F BK1F |
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STM8 |
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CPU |
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DM STALL |
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DM STALL/TRAP |
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(From |
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Slave DM |
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STALL bit |
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when |
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available) |
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SWTRAP bit |
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EXT STALL |
EXT |
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MANAGEMENT |
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STALL |
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SWTRF |
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FV_ROM |
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flag |
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FV_RAM |
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DM_CR2 |
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PERIPHERALS |
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ENFCTx |
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(Timers, USB,...) |
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DM_ENFCT |
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Doc ID 14024 Rev 3 |
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