SLE66R01PC datasheet(46/55 Pages) INFINEON

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SLE 66R01P / SLE 66R01PN

Command Set

Data Book

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2011-11-24

8.2.6

Set Password (SPWD)

The SPWD command writes a new 4 byte password to the dedicated password memory

1). The new written value

is transmitted in the response.

The SPWD command is always active independently of password configuration. If the SLE 66R01P and

SLE 66R01PN is configured for password protection, then the SPWD command can be executed only after a

successful password verification.

Figure 24

Set Password Command

1) For more information about password please read Chapter 5.

Table 20

Set Password (SPWD)

Command

Length

Code Parameter

Data

Integrity

Mechanism

Response

7 bytes

n.a.

4 bytes data

2 bytes CRC

(1 parity bit per byte)

4 bytes data + 2 bytes

CRC or

NACK or

Table 21

SPWD - behaviour in error case

Error / State

Idle/Halt

Ready

Active

Protected

Invalid Opcode

Parity, Miller

NACK1

Command Length

CRC

NACK1

The selected chip

is protected by

password

NACK0

n.a.

HV not OK

B1H

CRC1

NACK

613µs

min.

86µs

4239 µs

56µs

Command ‚Set Password’

PICC Response

ISO/IEC 14443 Type A Reader

Please note: Timing is rounded i .e. it is not exact grid timing

CRC 0

CRC 1

CRC0

528µs

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