Rainbow Electronics MAX66000 User Manual

Page 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
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

57 56

49 48

45 44

37 36

E0h

2Bh

FEATURE CODE (01h)

36-BIT IC SERIAL NUMBER

Figure 3. 64-Bit UID

START

1
0

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