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PDF IZ2822 Data sheet ( Hoja de datos )
| Número de pieza | IZ2822 | |
| Descripción | RFID circuit with read/write functions | |
| Fabricantes | Integral | |
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IZ2822
RFID circuit with read/write functions
(Functionally compatible to MF0 IC U1X.Philips)
General description
The IZ2822 RFID circuit with read/write functions is purposed for usage in contactless
plastic cards.
Application areas: transference supervisory control system, antitheft systems, access control sys-
tems in buildings, restricted areas, burglar alarm, registration & identification systems in transporta-
tion & technological processes.
External coil is connected to create contactless identifier mark. Build-in radio channel receive sig-
nal induced in antenna. This signal is used by power supply unit to generate supply voltage & by
control unit to separate clocking signal.
Main features
• 512 bit (16 pages x 4 bytes) EEPROM ;
• 100,000 memory program/erase cycles;
• Temperature range from minus 40 to plus 85 °С;
• ESD protection up to 2000 V;
• Latch current not less than 100 mA for 25 °С temperature;
• Contactless data & power supply transfer;
• Operating field frequency 13,56 MHz;
• Data transfer rate – 106 kbit/s;
• Build-in resonance capacitry 42,5 pF ≤ СR ≤ 57,5 pF;
• Anticollision function support, permit to process few identifier marks in receiving zone at
the same time;
• Data exchange meet international standards ISO 14443-2, ISO 14443-3, type A;
• Internal DC voltage limitation to prevent identifier mark fail in power electromagnetic
field.;
• Internal circuit clocking by means of separation of clock pulses from external electro-
magnetic field;
• data storage without power supply (non-volantive memory);
• sector organization of memory with possibility of writing protection of each sector
Tab.1 Contact pad description
Contact pad
number
Symbol
01 COIL1
Function
Coil connetion I/O
02
COIL2
Coil connetion I/O
03 UCC Power supply
04
DATA
Data output (testing)
05
GND
Common
Note – Contact pads UCC, GND, DATA are purposed only fo testing during IC
manufacturing and are not used by customer
1 Ver.00/11.07.2008
IZ2822-TSe.doc
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IZ2822
In this state the card supports the reader in resolving the first part of its UID (3 bytes) with
the anticollision commands (ANTICOLLISION) or card select command (SELECT) of cas-
cade level 1. This state is left correctly after one of two commands:
With the SELECT command of cascade level 1 the reader brings the card into ready state 2
(READY 2) where the second part of the UID has to be resolved.
With the READ (from address 0) command the complete anticollision mechanism may be skipped
and the card jumps directly into the active state ACTIVE.
If more than one card is in the field of the reader, a read from address 0 will cause a colli-
sion because of the different serial numbers, but all cards will be selected.
Any other data received in ready state 1 (READY 1) state is interpreted as an error and the
card jumps back to its waiting state (IDLE or HALT, depending on it's previous state).
Ready state 2 (READY2)
In this state, which is similar to state Readyl, the card supports the reader in resolving the second
part of its UID (4 bytes) with the ANTICOLLISION command of cascade level 2. This state is usu-
ally left with the SELECT command of cascade level 2.
Alternatively, state Ready2 may be skipped via a READ (from address 0) command as described
in state Readyl.
If more than one card is in the field of the PCD, a read from address 0 will cause a collision be-
cause of the different serial numbers, but all cards will be selected! The response of the card to
the SELECT of cascade level 2 command is the SAK (Select Acknowledge) byte. According to
ISO/IEC14443 this byte indicates whether the anticollision cascade procedure is finished. In addi-
tion it defines for the MIFARE architecture platform the type of the selected device. Now the card is
uniquely selected and only this device will continue communication with the reader even if other
contactless devices are in the field of the reader. Any other data received in this state is interpreted
as an error and the card jumps back to its waiting state (IDLE or HALT, depending on it's previous
state).
Active state (ACTIVE)
In the Active state either a READ (16 bytes) or a WRITE (4 bytes) command may be performed.
The correct way to leave this state is to send a HALT command. Any other data received in this
state is interpreted as an error and the card jumps back to its waiting state (IDLE or HALT, de-
pending on it's previous state).
Halt state (HALT)
Besides the Idle state the Halt state constitutes the second waiting state implemented in the card.
A card that has already been processed can be set into this state via the HALT command. This
state helps the reader in the anticollision phase to distinguish between already processed cards
and cards that have not been selected yet. The only way to get the card out of this state is the
WUPA command.
Any other data received in this state is interpreted as an error and the card remains in this state.
If not inspected command was not received command interpreter restore card to Idle state from
any state exepting Halt state. In case the Halt state card continue to be in this state.
Data transmission protocol
Data exchange protocol between reader and the card meet to the standard for contactless smart
cards ISO/IEC 14443 type A.
Reader-card data transmission
5 Ver.00/11.07.2008
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IZ2822
The command is ended by two bytes of cyclic redundant code CRC (a generating poly-
nomial x16 +x12 + x5 + 1), scaled on 7 previous bytes.
On receiving of card select command (at the complete matching by card UID, BCC, a par-
ity bit and CRC a code), the card should respond SAK - selection acknowledgment code (0x08)
SAK is transmitted in standard frame, following with two CRC bytes.
SAK
0x08
CRC
low byte
CRC
high byte
S 00010000 P LSB P MSB P E
Fig. 11 - Card response on card select command
Stop command
Stop command HALT consist of 4 bytes (two bytes of instruction code and two bytes of a
CRC-code) and is transmitted in a standard frame.
HALT
0х50
0х20
CRC
low byte
S 00010000 P 00010000 P LSB
CRC
high byte
P MSB
PE
Fig. 12 Stop command HALT
On receiving stop command HALT the card jump in idle mode and does not react to all
other commands, except request command for all cards WUPA.
COIL1
IZ2822
COIL2
L = 2,755 uHn
Fig.13 Recommended application diagramm
11 Ver.00/11.07.2008
IZ2822-TSe.doc
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