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PDF ATA5580 Data sheet ( Hoja de datos )
| Número de pieza | ATA5580 | |
| Descripción | The AES 125kHz Transponder | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Atmel ATA5580
The AES 125kHz Transponder with Open Immobilizer
Software Stack
PRELIMINARY DATASHEET
Features
● AES crypto transponder in plastic brick package
● Includes coil and capacitor for tuned circuit antenna
● Radio Frequency fRF = 125kHz
● Contactless power supply
● Contactless bidirectional data communication interface
● High performance AES encryption hardware unit
● Open immobilizer stack by Atmel®
● 2K EEPROM for secret key storage, field user data, and configuration data
● Error correction code support for NVM
● 32-bit unique ID
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● Multiple configuration registers
● Modulation/coding: Biphase, Manchester, QPLM
● Configurable baudrate
● –40°C to + 85°C operation Temperature
● LGA like brick package
9254A–RFID–02/12
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
Figure 2-2. The Flash Memory Partition
Flash 8kBytes
Address 0
0x0000 0
15
Flash 16kBytes
Address 0
0x0000 0
15
0x0BFE 3070
0x0BFF 3071
0x0FFF 4095
0x1BFE 7166
0x1BFF 7167
0x1FFF 8191
2.5.2
Non-volatile Memory
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Non-volatile memory used for data storage is implemented in EEPROM structures. This is subdivided into two pages.
Page one provides read and write access for storage of application and immobilizer data. This includes four special access
protection (AP0 - AP3) areas. The protection takes the form of requiring an intentional setting of the second register before
programming is possible. The AP0 location has been selected for exclusive use by the Atmel® Immobilizer firmware. The
application code should be audited to insure that this memory is not used to prevent corruption. Figure 2-3 on page 6 shows the
use of EEPROM Page 1.
Atmel ATA5580 [Preliminary DATASHEET]
9254A–RFID–02/12
5
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
2.6 Device Initialization
This section describes how the transponder device handles the initial power up sequence. The outcome or determination from
the initialization sequence depends on various conditional paths. These are described in the following sections. The system can
guarantee that the immobilizer functionality is given the highest preference and can operate independently from the application
code by means of this initialization sequence.
2.6.1
Power-up Scenarios
Power up occurs whenever there is a reset event. This can be power-on-reset (POR), external reset, watchdog reset, brown-out
reset, and transponder reset. This reset sets all registers, ports, and SRAM to initial conditions. The program counter is always
set to the reset vector located in the bootloader section. This ensures the priority of the immobilizer over all other functions. After
a fixed delay, a code is executed to check the conditions described as follows.
2.6.2
LF Field Detection
The very first item checked after the reset delay is the determination of the presence of an LF field. If the LF field is present then
the immobilizer function is used and the other conditional checks can be skipped and the immobilizer function executed.
If the LF field is NOT present, the initialization routine will eventually exit to the application code section after the next step.
Transponder Initialization will not occur.
2.6.3 Enhanced Mode Detection
This command does not apply to the Atmel® ATA5580 and will be ignored.
2.6.4
Transponder Initialization
Once all conditions have been met to enter transponder mode, the following items are configured to prepare for communication:
● The presence of LF field has to be acknowledged in order to enable operation of the transponder
● System clocks are reconfigured
● System resources are configured for the lowest power consumption possible
● The interrupt vector table is mapped into bootloader space
● The watchdog timer is configured and activated
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● System resources for Uplink and Downlink communication processing are initialized
2.6.5
Reliable Communication Channel Indication
Once the device has been initialized for transponder mode an indication of this readiness can be conveyed to the base station if
selected during device configuration. This is achieved through the transmission of a detection header that ensures with high
probability that the communication channel is open and reliable. Both the uplink and downlink paths are verified by this in the
following manner.
For the downlink to be successful, the transponder must receive enough power to operate. Once this condition is satisfied for a
long enough time to charge a buffer capacitor, the transponder can survive field gaps needed to transfer data. The fact that the
initialization routine was successfully executed up to this point means this has been achieved.
For the uplink to be successful, the transponder must modulate the carrier field with sufficient coupling and modulation depth
that the base station can recover the data from the carrier. By sending a modulated signal as defined by the detection header,
the base station can make a determination that the uplink path is open once this header is visible on the demodulated output.
Atmel ATA5580 [Preliminary DATASHEET]
9254A–RFID–02/12
11
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ATA5580.PDF ] | |
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