P5DF081_SDS

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Objective short data sheet

PUBLIC

Rev. 1 — 12 August 2010

191710

21 of 36

NXP Semiconductors

P5DF081

MIFARE SAM AV2

8.6.8 RC522 configuration commands

8.6.9 ISO14443 commands

Table 13.

RC522 configuration commands

Command

Description

RC_ReadRegister

Read the content of one or more register(s) of the connected reader chip.

The command allows reading 255 registers with one command. If a register address is listed more

than once in the data field, the content of this register will be re-read every time.

RC_WriteRegister

Write the content of one or more register(s) of the connected reader chip.

The command allows writing 127 registers with one command. If a register address with its

related content is listed more than once in the data field, the content of this register will be

re-written every time.

RC_RFControl

This command allows the radio frequency field to be turned off and on. The basic behavior

is the reset functionality where the controller turns off the field for the time given in the data

field. If a zero value is passed, the field is totally turned off. After turning off the field, to turn

it on again, the command can be issued with any value other than zero. Take into account

that the passed time value also in this case will force the MIFARE SAM AV2 to wait this

additional time until turning on the field again.

RC_Init

Establishes the serial connection between MIFARE SAM AV2 and RC222 and initializes the reader

chip with the register values stored in the selected register value set.

RC_LoadRegister

ValueSet

Stores a customer defined register value set for the RC222 in the non-volatile memory of the

MIFARE SAM AV2. This set can then be used for initializing the reader chip with the RC_Init

command. The address of and the related value for the register have to be placed

consecutively in the command data field of the APDU.

Table 14.

ISO14443 commands

Command

Description

ISO14443-3_Request_Wakeup

Issue a request or wake-up command.

ISO14443-3_Anticollision_Select

Perform bit-wise anticollision and select. The anticollision and the following

select are performed according to the select code in the data field.

ISO14443-3_ActivateIdle

Carries out one or several request - anticollision - select sequences and

returns the SAK and the UID of the selected card(s). The ATQA is returned

for every request issued, this means for every newly activated card. Due to

the fact that the resulting ATQA is the OR-function of all ATQAs, the value

may change frequently.

ISO14443-3_ActivateWakeup

The command reactivates and selects a card that has previously been set to

Halt state. The command takes the UID of the card to reactivate.

ISO14443-3_HaltA

The command puts a selected card into Halt state.

ISO14443-3_TransparentExchange

Exchange bytes/bits transparently. The MIFARE SAM AV2 will take the user

data and send it without changing, inserting or appending any content to the

contactless card. Appending of a CRC, time-out settings, etc. have to be

configured by directly writing the RC222 registers. Take into account that

switching settings of the reader chip influence all subsequent MIFARE SAM

AV2 commands proposing the correct reader chip settings, i.e. ISO14443-

4_Exchange.

ISO14443-4_RATS_PPS

Execute a combined RATS and PPS sequence to prepare a card for T=CL data

exchange.

The CID assigned to the card will be assigned to the current logical channel. This

means, every further ISO14443-4 command issued in this logical channel will be

executed using this CID automatically.