SD Password Protect Command Sequence

set password :

• CMD7 : Select Card
• CMD16 : Set Block Length
• CMD42 with Block Data

reset password :

• CMD7 : Select Card
• CMD16 : Set Block Length
• CMD42 with BlockData

Lock

• CMD7 : Select Card
• CMD16: Set Block Length
• CMD42 with BlockData

Unlock

• CMD7 : Select Card
• CMD16 : Set Block Length
• CMD42 with BlockData

Erase

• CMD7 : Select Card
• CMD16 : Set Block Length (to 1 byte only)
• CMD42 with BlockData

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Result of CMD42