Rainbow-electronics MAX66000 Manual de usuario descargar pdf (Pagina 3)

MAX66000

ISO/IEC 14443 Type B-Compliant

64-Bit UID

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Parasite Power

As a wireless device, the MAX66000 is not connected

to any power source. It gets the energy for operation

from the surrounding RF field, which needs to have a

minimum strength as specified in the

Electrical

Characteristics

table.

Unique Identification Number (UID)

Each MAX66000 contains a factory-programmed and

locked identification number that is 64 bits long

(Figure 3). The lower 36 bits are the serial number of the

chip. The next 8 bits store the device feature code,

which is 01h. Bits 45 to 48 are 0h. The code in bit loca-

tions 49 to 56 identifies the chip manufacturer according

to ISO/IEC 7816-6/AM1. This code is 2Bh for Maxim.

The code in the upper 8 bits is E0h. The UID is read

accessible through the Get UID and Get System

Information commands. The lower 32 bits of the UID are

transmitted in the PUPI field of the ATQB response to

the REQB, WUPB, or SLOT-MARKER command. The

upper 32 bits of the UID are factory programmed into

the application data field, which is transmitted as part of

the ATQB response. This way the master receives the

complete UID in the first response from the slave. See

the

Network Function Commands

section for details.

ISO/IEC 14443 Type B

Communication Concept

The communication between the master and the

MAX66000 (slave) is based on the exchange of data

packets. The master initiates every transaction; only

one side (master or slaves) transmits information at any

time. Data packets are composed of characters, which

always begin with a START bit and typically end with

one or more STOP bits (Figure 4). The least significant

data bit is transmitted first. Data characters have 8 bits.

Each data packet begins with a start-of-frame (SOF)

character and ends with an end-of-frame (EOF) charac-

ter. The EOF/SOF characters have 9 all-zero data bits

(Figure 5). The SOF has 2 STOP bits, after which data

characters are transmitted. A data packet with at least

AVAILABLE COMMANDS: DATA FIELD AFFECTED:

REQUEST (REQB)

WAKEUP (WUPB)

SLOT-MARKER

HALT (HLTB)

SELECT (ATTRIB)

DESELECT (DESELECT)

AFI, ADMINISTRATIVE DATA

(ADMINISTRATIVE DATA)

PUPI

PUPI, ADMINISTRATIVE DATA

(ADMINISTRATIVE DATA)

NETWORK

FUNCTION COMMANDS

GET SYSTEM INFORMATION

GET UID

64-BIT UID, AFI, CONSTANTS

64-BIT UID

MEMORY FUNCTION

COMMANDS

COMMAND LEVEL:

MAX66000

Figure 2. Hierarchical Structure of ISO/IEC 14443 Type B Protocol

MSb LSb

64 57 56 49 48 45 44 37 36 1

E0h 2Bh 0h FEATURE CODE (01h) 36-BIT IC SERIAL NUMBER

Figure 3. 64-Bit UID

START

BIT 1

BIT 2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 7 BIT 8

LSb MSb

STOP

Figure 4. ISO/IEC 14443 Data Character Format

1 2 3 4 5 6 7 8 ... 20 21

MAX66000 1
64-Bit UID 1

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