AT88SC3216CRF-MY1 Просмотр технического описания (PDF) - Atmel Corporation

Номер в каталоге

Компоненты Описание

производитель

AT88SC3216CRF-MY1

CryptoRF® Specification

Atmel Corporation 

AT88SC0808/1616/3216/6416CRF, AT88RF04C

5.1.2.

Command Field Descriptions

AFI:

The Application Family Identifier (AFI) is used to select the family and sub-family of cards which the PCD

is targeting. Only PICCs with a matching AFI code are permitted to answer an REQB or WUPB

command. Table 5 describes the AFI matching criteria. An AFI of $00 activates all Type B PICCs.

Table 5. AFI matching criteria for polling commands received by the PICC.

AFI

High Bits

AFI

Low Bits

REQB/WUPB Polling produces a

PICC response from:

$0

$0

All Families and sub-families

“X”

$0

All sub-families of Family “X”

“X”

“Y”

Only sub-family “Y” of Family “X”

$0

“Y”

Proprietary sub-family “Y” Only

“Y” = $1 to $F

“X” = $1 to $F

PARAM: The PARAM byte is used to send two parameters to the PICC. The parameter “N”, which assigns the

number of anticollision slots, and the REQB / WUPB selection bit.

Figure 3.

Bit 7

0

Definition of the PARAM byte in the REQB/WUPB command.

Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

0

0

0

RW

N

Table 6.

Bit 2

0

0

0

0

1

1

1

1

Coding of “N”, the number of anticollision slots, in the PARAM byte.

Bit 1 Bit 0

N

0

0

1

0

1

2

1

0

4

1

1

8

0

0

16

0

1

RFU

1

0

RFU

1

1

RFU

Table 7. Coding of the REQB / WUPB selection bit in the PARAM byte.

Bit 3

Command

0

REQB

1

WUPB

CRC:

Communication error detection bytes.

11

5276C–RFID–3/09

Share Link: