MAX66020K-000AA+【PDF 6/25 页】IC RFID UID 1KB TYPEB MEM KEYFOB

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ISO/IEC 14443 Type B-Compliant

1Kb Memory Fob

Table 1. Memory Protection Matrix

AFFECTED MEMORY AREA

CONTROLLING

REGISTER*

BLOCKS

00h TO 03h

BLOCKS

04h TO 07h

BLOCKS BLOCKS

08h TO 0Bh 0Ch TO 0Fh

APPLICATION

DATA FIELD

AFI

U1

S-LOCK

BP1

BP2

BP3

BP4

ADF-Lock

AFI-Lock

U1-Lock

S-Lock

E, W

—

—

—

—

—

—

—

—

E, W

—

—

—

—

—

—

—

—

E, W

—

—

—

—

—

—

—

—

E, W

—

—

—

—

—

—

—

—

W

—

—

—

—

—

—

—

—

W

—

—

—

—

—

—

—

—

W

—

—

—

—

—

—

—

—

W

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

and 3 for additional details.

Legend (Table 1):

CODE

E

W

DESCRIPTION

ERPOM-Emulation Mode

Write Protection

Table 2. BP1 to BP4 Protection Code Assignments

CODE

00000000b

(00h)

00001010b

(0Ah)

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

(Axh)

DESCRIPTION

Unlocked (factory default)

EPROM-Emulation Mode (irreversible)

BP1: blocks 00h to 03h

BP2: blocks 04h to 07h

BP3: blocks 08h to 0Bh

BP4: blocks 0Ch to 0Fh

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)

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

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

CODE

00000000b (00h)

10101010b (AAh)

All other codes

Unlocked (factory default)

Locked (irreversible)

Unlocked

DESCRIPTION

6

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