Redundancy - CTL

1
Redundancy - CTL

• Value Range for DataBitMap

2
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 Slimanes proposal)

• Signals
• Q319..0 Out
• A8..0 In
• D319..0 In
• CLK In
• RER In
• FAL50 In
• REL In
• FAR 80 In

5
CTL .. contd

• Environment myStrangeMemory
• CTL
• RER DataType RepairEnable ActiveState
  ForceUp
• FAR5..0 DataType RepairDataBit ValueRange
  0 63
• REL DataType RepairEnable ActiveState
  ForceUp
• FAL8..0 DataType RepairDataBit ValueRange
  0 287

6
CTL .. contd

• MemoryProperties
• SimultaneousReadWrite None
• ColumnMultiplexing 16
• TopologicalOrg Adjacent
• MemoryRepair
• RepairResource Column1
• RepairType Column
• AccessSignals REL FAL5..0
• Width 1
• AddressMap xxxxxxxxxx / Not required /
• DataBitMap 0_00rr_rrrr / Works well all
  values from 0 ? 63/
• RepairResource Column2
• RepairType Column
• AccessSignals RER FAR8..0
• Width 1
• AddressMap xxxxxxxxxxxxxx

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