Technical Manual

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East Wind Technologies, Inc.

Address: 1byte, Ultralight EV1 counters address.

Success:

Frame

0x48

Data

Checksum

Data: 3 bytes Ultralight EV1 counter data.

Failure:

Frame

0xB7

Checksum

3.5.10 Ultralight EV1 INCR_CNT

Function: The INCR_CNT command is used to increment one of the 3 one-way counters of

the Ultralight EV1. The two arguments are the counter number and the increment value.

Host sends:

Frame

0x49

Address

Data

Checksum

Address: 1byte, Ultralight EV1 counters address.

Data: 3 bytes, Ultralight EV1 INCR_CNT data.

Success:

Frame

0x49

Checksum

Failure:

Frame

0xB6

Checksum

3.5.11 Ultralight EV1 PWD_AUTH

Function: A protected memory area can be accessed only after a successful password

authentication using the PWD_AUTH command.

Host sends:

Frame

0x4A

PWD

Checksum

PWD: 4byte, Ultralight EV1 card password.

Success:

Frame

0x4A

Checksum

Failure:

Frame

0xB5

Checksum

3.5.12 Ultralight EV1 READ_SIG

Function: The READ_SIG command returns an IC-specific, 32-byte ECC signature, to

verify NXP Semiconductors as the silicon vendor. The signature is programmed at chip

production and cannot be changed afterwards.

Host sends:

Frame

0x4B

Checksum