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bus_trim

Component for trimming and distributing failure rates across the bus architecture (LPDDR4).

BusTrim

Bases: Base

Component for trimming and distributing failure rates across the bus architecture.

This module injects specific bus-related fault sources (MBE, AZ) and redistributes SBE, DBE, and TBE faults for both SPFM and LFM paths.

Source code in src/ecc_analyzer/models/lpddr4/bus_trim.py 
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class BusTrim(Base):
    """Component for trimming and distributing failure rates across the bus architecture.

    This module injects specific bus-related fault sources (MBE, AZ) and redistributes
    SBE, DBE, and TBE faults for both SPFM and LFM paths.
    """

    def __init__(self, name: str):
        """Initializes the BusTrim component with LPDDR4-specific split parameters.

        Args:
            name (str): The descriptive name of the component.
        """
        self.spfm_sbe_split = {FaultType.SBE: 0.438}
        self.spfm_dbe_split = {FaultType.SBE: 0.496, FaultType.DBE: 0.314}
        self.spfm_tbe_split = {
            FaultType.SBE: 0.325,
            FaultType.DBE: 0.419,
            FaultType.TBE: 0.175,
        }

        self.lfm_sbe_split = {FaultType.SBE: 0.438}
        self.lfm_dbe_split = {FaultType.SBE: 0.496, FaultType.DBE: 0.314}

        self.spfm_mbe_source = 2.3
        self.spfm_az_source = 172.0

        super().__init__(name)

    def configure_blocks(self):
        """Configures the root block as a collection of fault injections and split operations.

        Uses a SumBlock to aggregate source injections and parallel redistribution
        (SplitBlocks) of incoming faults.
        """
        self.root_block = SumBlock(
            self.name,
            [
                BasicEvent(FaultType.MBE, self.spfm_mbe_source, is_spfm=True),
                BasicEvent(FaultType.AZ, self.spfm_az_source, is_spfm=True),
                SplitBlock("SPFM_SBE_Split", FaultType.SBE, self.spfm_sbe_split, is_spfm=True),
                SplitBlock("SPFM_DBE_Split", FaultType.DBE, self.spfm_dbe_split, is_spfm=True),
                SplitBlock("SPFM_TBE_Split", FaultType.TBE, self.spfm_tbe_split, is_spfm=True),
                SplitBlock("LFM_SBE_Split", FaultType.SBE, self.lfm_sbe_split, is_spfm=False),
                SplitBlock("LFM_DBE_Split", FaultType.DBE, self.lfm_dbe_split, is_spfm=False),
            ],
        )

__init__(name)

Initializes the BusTrim component with LPDDR4-specific split parameters.

Parameters:

Name Type Description Default
name str

The descriptive name of the component.

 required
Source code in src/ecc_analyzer/models/lpddr4/bus_trim.py 
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def __init__(self, name: str):
    """Initializes the BusTrim component with LPDDR4-specific split parameters.

    Args:
        name (str): The descriptive name of the component.
    """
    self.spfm_sbe_split = {FaultType.SBE: 0.438}
    self.spfm_dbe_split = {FaultType.SBE: 0.496, FaultType.DBE: 0.314}
    self.spfm_tbe_split = {
        FaultType.SBE: 0.325,
        FaultType.DBE: 0.419,
        FaultType.TBE: 0.175,
    }

    self.lfm_sbe_split = {FaultType.SBE: 0.438}
    self.lfm_dbe_split = {FaultType.SBE: 0.496, FaultType.DBE: 0.314}

    self.spfm_mbe_source = 2.3
    self.spfm_az_source = 172.0

    super().__init__(name)

configure_blocks()

Configures the root block as a collection of fault injections and split operations.

Uses a SumBlock to aggregate source injections and parallel redistribution (SplitBlocks) of incoming faults.

Source code in src/ecc_analyzer/models/lpddr4/bus_trim.py 
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def configure_blocks(self):
    """Configures the root block as a collection of fault injections and split operations.

    Uses a SumBlock to aggregate source injections and parallel redistribution
    (SplitBlocks) of incoming faults.
    """
    self.root_block = SumBlock(
        self.name,
        [
            BasicEvent(FaultType.MBE, self.spfm_mbe_source, is_spfm=True),
            BasicEvent(FaultType.AZ, self.spfm_az_source, is_spfm=True),
            SplitBlock("SPFM_SBE_Split", FaultType.SBE, self.spfm_sbe_split, is_spfm=True),
            SplitBlock("SPFM_DBE_Split", FaultType.DBE, self.spfm_dbe_split, is_spfm=True),
            SplitBlock("SPFM_TBE_Split", FaultType.TBE, self.spfm_tbe_split, is_spfm=True),
            SplitBlock("LFM_SBE_Split", FaultType.SBE, self.lfm_sbe_split, is_spfm=False),
            SplitBlock("LFM_DBE_Split", FaultType.DBE, self.lfm_dbe_split, is_spfm=False),
        ],
    )