8.13.1 Functional

Figure 8-17. Verify Password Command Functional Description

Read password indices: $10 to $17 for passwords 0, 1, 2 and 7.

Write password indices: $00 to $07 for passwords 0, 1, 2 and 7.

Secure code index: $07 (equivalent to Write Password 7).

Four password index bits, "r" and "ppp", indicate the password to compare:

  • r = 0 : Write Password
  • r = 1 : Read Password
  • p2p1p0 : Password Set Number
Figure 8-18. Verify Password
???

Once the sequence has been carried out, the device requires the host to perform an ACK polling sequence with the System Read command ($B6). To determine whether the inserted password was correct, the host can read the corresponding attempts counter and verify that the value is zero.