AT88SC3216CRF-MVB1G Atmel, AT88SC3216CRF-MVB1G Datasheet - Page 128

• Manufacturer Part Number: AT88SC3216CRF-MVB1G
• Description: CRYPTOMEMORY 32KBIT 16ZONE MVB
• Manufacturer: Atmel
• Series: CryptoMemory®, CryptoRF®r

Specifications of AT88SC3216CRF-MVB1G

• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: ISO1444-2, 1444-3, 32-kbits
• Package / Case: MVB Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L.4.
L.5.
128
Reliability Impact of Anti-Tearing
Each byte of the CryptoRF EEPROM user memory and configuration memory is rated for 100k write cycles minimum.
The entire memory can be written at least 100,000 times without wearing out any of the EEPROM memory bits.
Table 105.
All anti-tearing write commands sent to a PICC are processed in a single buffer EEPROM memory before being written
to the final EEPROM memory location. As a result, the write endurance for anti-tearing writes is a per-unit specification,
not a per-byte specification. A minimum of 50,000 anti-tearing write commands can be processed without wearing out
any of the buffer EEPROM bits, or the EEPROM Anti-Tearing Flag bits.
Activating Anti-Tearing
Anti-Tearing can be used for either User Zone or Configuration Memory writes on 88SC PICCs. Anti-Tearing is
available for User Zone writes only on 88RF PICCs. Activation of this optional feature is described in this section.
The Set User Zone command is used to activate the anti-tearing feature when writing the user memory. To turn anti-
tearing on, send a Set User Zone command with bit 7 in the PARAM byte set to 1b. Any Write User Zone command
that is received following anti-tearing activation will automatically use the anti-tearing write process. To turn anti-tearing
off, send a Set User Zone command with bit 7 in the PARAM byte set to 0b. All subsequent Write User Zone
commands will automatically use the normal write process.
Figure 41.
When writing the Configuration Memory on 88SC PICCs the anti-tearing function is controlled by the PARAM byte of
the Write System Zone command. Table 106 shows the PARAM byte options. If the PARAM byte of the Write System
Zone command is $80, then the anti-tearing write process is used. If the PARAM byte of the Write System Zone
command is $00, then the normal write process is used.
Table 106.
AT88SC0808/1616/3216/6416CRF, AT88RF04C
Write Endurance (each Byte)
Anti-Tearing Write Endurance
Write System Zone
Write System Zone w A/T
Write Fuse Byte
Bit 7
AT
Bit 6
CryptoRF Family Write Endurance with Anti-Tearing
Definition of the PARAM byte of the Set User Zone command.
PARAM byte options for the Write System Zone command for 88SC PICCs.
Parameter
Command
0
Bit 5
0
Bit 4
0
Bit 3
All Other Values Are Not Supported
PARAM
100,000
50,000
Min
$00
$80
$01
Bit 2
User Zone
Bit 1
Fuse ADDR
Address
Address
Typical
ADDR
Bit 0
# of bytes – 1
# of bytes – 1
Max
“L”
$00
Write Cycles
“L + 1” bytes
“L + 1” bytes
5276C–RFID–3/09
Writes
DATA
1 byte
Units