AT88SC3216CRF-MVB1G Atmel, AT88SC3216CRF-MVB1G Datasheet - Page 100

• 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

H.3.
H.3.1. Device Configuration Register (DCR)
100
Device Configuration Options
There are a few configuration options which affect the overall behavior of the CryptoRF PICC. These options are
contained in the Device Configuration Register (DCR).
There is one Device Configuration Register in each PICC. The default state of this register is $FF for 88SC PICCs and
$7C for 88RF PICCs.
Figure 28.
Figure 29.
The DCR register definition is shown in Figure 28
to the DCR are effective at the next Power On or anticollision sequence.
SME:
By default the Supervisor Mode is disabled on 88SC PICCs and enabled on 88RF PICCs. If SME = 0b then Supervisor
Mode is enabled and Password Write 7 becomes the Supervisor Password. Successful verification of the Supervisor
Password grants read and write access to all passwords and Password Attempt Counters (PACs), allowing the
passwords to be changed and PACs to be reset.
UCR:
By default the UCR is disabled. If UCR = 0b then Unlimited Checksum Reads are enabled. This function is intended for
development use only, since it allows systematic attacks on the security. This function does not affect the Password
Attempts Counters (PACs).
UAT:
By default the UAT is disabled. If UAT = 0b then the Authentication Attempts Counters (AACs) are disabled for all key
sets. This function is intended for development use only, since it allows systematic attacks on the security. This
function does not affect the Password Attempts Counters (PACs).
ETA:
By default the Extended Trials Allowed option is disabled. If this option is enabled by setting ETA = 0b then the
maximum number of authentication and password trials is increased to permit a maximum of eight attempts before a
password or key is locked. If ETA is disabled then only four attempts are permitted.
EGTL:
By default the Extra Guard Time Length option is disabled, which maximizes RF communication speed. This option
controls the Extra Guard Time (EGT) for all data transmitted by the PICC. The default setting of EGTL = 0b selects
zero ETUs of EGT. Setting EGTL = 1b selects two ETUs of EGT for all transmissions. The EGTL option does not affect
EGT requirements for data transmitted by the reader. See Appendix O for information about EGT.
WCS:
By default the WCS is enabled. In authentication and encryption communication security modes the correct checksum
must be provided within 77 mS or the write operation is aborted. Setting WCS = 1b disables the timeout function.
RCS:
By default the RCS is enabled, which allows one Read Checksum operation without resetting the cryptographic engine.
AT88SC0808/1616/3216/6416CRF, AT88RF04C
Bit 7
SME
Bit 7
SME
1
0
Bit 6
UCR
Bit 6
RFU
Definition of the Device Configuration Register for 88SC PICCs.
Definition of the Device Configuration Register for 88RF PICCs.
Supervisor Mode Enable control.
Unlimited Checksum Read control. [88SC]
Unlimited Authentication Trials control.
Extended Trials Allowed control. [88SC]
Extra Guard Time Length control.
Write Checksum Timeout control. [88RF]
Read Checksum control. [88RF]
1
1
Bit 5
Bit 5
UAT
UAT
1
1
Bit 4
Bit 4
RFU
ETA
1
1
EGTL
EGTL
Bit 3
Bit 3
1
1
and Figure
Bit 2
Bit 2
RFU
RFU
1
1
WCS
Bit 1
RFU
Bit 1
29. Bits 0, 1, and 2 are reserved for future use. Changes
1
0
Bit 0
Bit 0
RFU
RCS
1
0
Default Value
Default Value
5276C–RFID–3/09