Redundancy - CTL

1. Redundancy - CTL Value Range for DataBitMap

2. Rows 0 thru 511 Bit 0 Bit 63 Memory Description • No column multiplexing • Split into two banks • left bank is 64 bits • right bank is 288 bits • Two spare column • one for each left bank and right bank • Can repair any one column in respective bank Bit64 Bit 319

3. Block Diagram Q A D CLK FAL REL FAR RER

4. CTL (using Slimane’s proposal) Signals { “Q”[319..0] Out; “A”[8..0] In; “D”[319..0] In; “CLK” In; “RER” In; “FAL”[5:0] In; “REL” In; “FAR” [8:0] In }

5. CTL .. contd Environment “myStrangeMemory” { CTL { RER { DataType RepairEnable {ActiveState ForceUp;}} FAR[5..0] {DataType RepairDataBit; { ValueRange 0 63; } } REL { DataType RepairEnable {ActiveState ForceUp;}} FAL[8..0] {DataType RepairDataBit; { ValueRange 0 287; }} } }

6. CTL .. contd MemoryProperties { SimultaneousReadWrite None: ColumnMultiplexing 16: TopologicalOrg Adjacent; } MemoryRepair{ RepairResource Column1 { RepairType Column; AccessSignals ‘REL + FAL[5..0]’ Width 1 AddressMap xxxxxxxxxx /* Not required */ DataBitMap 0_00rr_rrrr /* Works well all values from 0  63*/ } RepairResource Column2 { RepairType Column; AccessSignals ‘RER + FAR[8..0]’ Width 1 AddressMap xxxxxxxxxxxxxx DataBitMap r_rrrr_rrrr /* No mapping available for bit range 64  319 */ }

7. Discussion • Need two fields • Valid value range for the control pins / bits. • valid value range for DataBitMap to use the repair resource • Alternatively bit-wise representation for DataBitMap