MAX66020K-000AA+ Datasheet MAX66020K-000AA+ | P4-P6

MAX66020

ISO/IEC 14443 Type B-Compliant

1Kb Memory Fob

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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

WRITE SINGLE BLOCK

LOCK BLOCK

READ SINGLE BLOCK

READ SINGLE BLOCK WITH

BLOCK SECURITY STATUS

CUSTOM READ BLOCK

WRITE AFI

LOCK AFI

GET UID

64-BIT UID, AFI, CONSTANTS

DATA OF SELECTED MEMORY BLOCK, APPLICABLE PROTECTION CONTROL REGISTER

PROTECTION CONTROL REGISTER

SELECTED MEMORY BLOCK

SELECTED MEMORY BLOCK, APPLICABLE PROTECTION CONTROL REGISTER

SELECTED MEMORY BLOCK, INTEGRITY BYTES

AFI BYTE

AFI-LOCK BYTE

64-BIT UID

MEMORY AND CONTROL

FUNCTION COMMANDS

COMMAND LEVEL:

MAX66020

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 (02h) 36-BIT IC SERIAL NUMBER

Figure 3. 64-Bit UID

Unique Identification Number (UID)

Each MAX66020 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 02h. Bits 45 to 48 are 0h. The code in

bit locations 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. By default, 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.

Detailed Memory Description

The memory of the MAX66020 is organized as 18

blocks of 8 bytes each. Figure 4 shows the memory

map. The first 16 blocks (block numbers 00h to 0Fh in

hexadecimal counting) are the user EEPROM, the area

for application-specific data. Four adjacent blocks are

referred to as a page. Blocks 00h to 03h are page 0,

blocks 04h to 07h are page 1, blocks 08h to 0Bh are

page 2, and blocks 0Ch to 0Fh are page 3.

Block 10h provides storage for user-programmable

parameters that are defined by the ISO/IEC 14443 stan-

dard. These are application data field and AFI. The

remaining bytes (U1, U2, U3) are not defined by the

communication standard; the application software can

use them, e.g., for proprietary markings. Block 11h con-

tains control bytes that determine the operation of the

individual pages (EPROM-emulation mode, write protec-

tion of individual blocks), or to write protect the applica-

tion data field, the AFI, and U1. The S-Lock byte, if

programmed to a suitable code, only protects itself from

future changes. The self-protection feature can be used

to permanently mark the fob as being “special,” as

defined by the application. Table 1 illustrates the rela-

tionship between the controlling register in block 11h

and the memory area affected. Tables 2 and 3 specify

the code assignments to achieve the protection.

Besides the storage for 8 data bytes, each memory

block has 2 integrity bytes, which are not memory

mapped. The integrity bytes function as a MAX66020-

maintained, 16-bit write-cycle counter. Having

reached its maximum value of 65,535, the write-cycle

counter stops incrementing, but does not prevent

additional write cycles to the memory block. The

integrity bytes can be read through the Custom Read

Block command.

MAX66020

ISO/IEC 14443 Type B-Compliant

1Kb Memory Fob

_______________________________________________________________________________________ 5

DATA BYTE NUMBER

(SEQUENCE LEFT TO RIGHT AS WRITTEN TO OR READ FROM DEVICE)

INTEGRITY BYTES

BLOCK

NUMBER

0 1 2 3 4 5 6 7 LSB MSB

00h Page 0 User EEPROM R/(W) Write-Cycle Counter

01h Page 0 User EEPROM R/(W) Write-Cycle Counter

02h Page 0 User EEPROM R/(W) Write-Cycle Counter

03h Page 0 User EEPROM R/(W) Write-Cycle Counter

04h Page 1 User EEPROM R/(W) Write-Cycle Counter

05h Page 1 User EEPROM R/(W) Write-Cycle Counter

06h Page 1 User EEPROM R/(W) Write-Cycle Counter

07h Page 1 User EEPROM R/(W) Write-Cycle Counter

08h Page 2 User EEPROM R/(W) Write-Cycle Counter

09h Page 2 User EEPROM R/(W) Write-Cycle Counter

0Ah Page 2 User EEPROM R/(W) Write-Cycle Counter

0Bh Page 2 User EEPROM R/(W) Write-Cycle Counter

0Ch Page 3 User EEPROM R/(W) Write-Cycle Counter

0Dh Page 3 User EEPROM R/(W) Write-Cycle Counter

0Eh Page 3 User EEPROM R/(W) Write-Cycle Counter

0Fh Page 3 User EEPROM R/(W) Write-Cycle Counter

10h ISO/IEC 14443 Application Data Field AFI U1 U2 U3 Write-Cycle Counter

11h BP1 BP2 BP3 BP4 ADF-Lock AFI-Lock U1-Lock S-Lock Write-Cycle Counter

Figure 4. Memory Map

MAX66020

ISO/IEC 14443 Type B-Compliant

1Kb Memory Fob

6 _______________________________________________________________________________________

AFFECTED MEMORY AREA

CONTROLLING

BLOCKS

00h TO 03h

BLOCKS

04h TO 07h

BLOCKS

08h TO 0Bh

BLOCKS

0Ch TO 0Fh

APPLICATION

DATA FIELD

AFI U1 S-LOCK

BP1 E, W — — — — — — —

BP2 — E, W — — — — — —

BP3 — — E, W — — — — —

BP4 — — — E, W — — — —

ADF-Lock — — — — W — — —

AFI-Lock — — — — — W — —

U1-Lock — — — — — — W —

S-Lock — — — — — — — W

Table 1. Memory Protection Matrix

CODE DESCRIPTION

E ERPOM-Emulation Mode

W Write Protection

Legend (Table 1):

CODE DESCRIPTION

00000000b

(00h)

Unlocked (factory default)

00001010b

(0Ah)

EPROM-Emulation Mode (irreversible)

BP1: blocks 00h to 03h

BP2: blocks 04h to 07h

BP3: blocks 08h to 0Bh

BP4: blocks 0Ch to 0Fh

1010<b3><b2><b1><b0>b

(Axh)

Write-Protect Block Mode. Once set to Ah, the upper nibble cannot be changed to any other

value (irreversible). The bits of the lower nibble can still be changed only from 0 (unlocked) to 1

(locked) to write protect blocks individually.

b0: block 00h (BP1), block 04h (BP2), block 08h (BP3), block 0Ch (BP4)

b1: block 01h (BP1), block 05h (BP2), block 09h (BP3), block 0Dh (BP4)

b2: block 02h (BP1), block 06h (BP2), block 0Ah (BP3), block 0Eh (BP4)

b3: block 03h (BP1), block 07h (BP2), block 0Bh (BP3), block 0Fh (BP4)

Table 2. BP1 to BP4 Protection Code Assignments

If programmed to a locking (protecting) code, the controlling register irreversibly protects itself from further changes. See Tables 2

and 3 for additional details.

Note: Do not program the upper nibble of BP4 to 9 or 5, because this blocks the read access to blocks 0Ch to 0Fh.

CODE DESCRIPTION

00000000b (00h) Unlocked (factory default)

10101010b (AAh) Locked (irreversible)

All other codes Unlocked

Table 3. Protection Code Assignments for ADF-Lock, AFI-Lock, U1-Lock, S-Lock

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P25

MAX66020K-000AA+

Mfr. #:

Buy MAX66020K-000AA+

Manufacturer:

Maxim Integrated

Description:

RFID Transponders ISO/IEC 14443 Type B Comp 1Kb Mem Fo

Lifecycle:

New from this manufacturer.

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MAX66020K-000AA+