|
|
PDF LRI512 Data sheet ( Hoja de datos )
| Número de pieza | LRI512 | |
| Descripción | Memory TAG IC 512 bit High Endurance EEPROM 13.56MHz / ISO 15693 Standard Compliant with E.A.S. | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LRI512 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
LRI512
Memory TAG IC 512 bit High Endurance EEPROM
13.56MHz, ISO 15693 Standard Compliant with E.A.S.
FEATURES SUMMARY
s ISO15693 Standard: Fully Compliant
s 13.56 MHz ±7 kHz Carrier Frequency
s To the LRI512:
10% or 100% ASK modulation using:
– 1/4 pulse position coding (26 kbit/s)
– 1/256 pulse position coding (1.6 kbit/s)
s From the LRI512:
Load modulation using Manchester coding with
423 kHz and 484 kHz subcarrier in:
– Fast data rate (26 kbit/s)
– Low data rate (6.6 kbit/s)
s Internal Tuning Capacitor
s 512 bits EEPROM with Block Lock Feature
s 64-bit Unique Identifier (UID)
s EAS features
s READ block and WRITE block (32-bit blocks)
s 5 ms Programming Time (typical)
s More than 100,000 Erase/Write Cycles
s More than 40 Year Data Retention
Figure 1. Delivery Forms
Antenna
(A1T/ISOR, A1S/ISOR)
Antenna
(A2T/ISOK)
Antenna
(C40)
July 2002
Wafer
1/54
1 page  
LRI512
DATA RATE AND DATA CODING
The data coding implemented in the LRI512 uses
pulse position modulation. Both data coding
modes that are described in the ISO15693 are
supported by the LRI512. The selection is made
by the VCD and indicated to the LRI512 within the
Start of Frame (SOF).
Data Coding Mode: 1 Out of 256
The value of one single byte is represented by the
position of one pause. The position of the pause
on 1 of 256 successive time periods of 18.88 µs
(256/fC), determines the value of the byte. In this
Figure 5. 1 Out of 256 Coding Mode
case the transmission of one byte takes 4.833 ms
and the resulting data rate is 1.65 kbit/s (fC/8192).
Figure 5 illustrates this pulse position modulation
technique. In this figure, data E1h (225d) is sent by
the VCD to the LRI512.
The pause shall occur during the second half of
the position of the time period that determines the
value, as shown in Figure 6.
A pause during the first period transmit the data
value 00h. A pause during the last period transmits
the data value FFh (255d).
Pulse
Modulated
Carrier
9.44 µs
18.88 µs
01 2
3 .. . . . . . .
.. . . . . . . .
.. . . . . . . .
2 .....................
2 .....................
5 .....................
2222
5555
2345
4.833 ms
AI06656
Figure 6. Detail of One Time Period
9.44 µs
18.88 µs
Pulse
Modulated
Carrier
.......
2
2
4
.......
22
22
56
Time Period
one of 256
AI06657
5/54
5 Page 
LRI512
LRI512 TO VCD FRAMES
Frames are delimited by an SOF and EOF and are
implemented using code violation. Unused options
are reserved for future use.
For the low data rate, the same subcarrier fre-
quency or frequencies are used. In this case the
number of pulses shall be multiplied by 4.
The VCD is ready to receive a response frame
from the LRI512 within less than t1 after having
sent a command frame (as specified in Table 59).
SOF When Using One Subcarrier
High Data Rate. SOF comprises 3 parts: (see
Figure 20)
– an unmodulated time of 56.64 µs,
– 24 pulses of 423.75 kHz (fc/32),
– a logic 1 which starts with an unmodulated time
of 18.88 µs followed by 8 pulses of 423.75 kHz.
Low Data Rate. SOF comprises 3 parts: (see
Figure 21)
– an unmodulated time of 226.56 µs,
– 96 pulses of 423.75 kHz (fc/32),
– a logic 1 which starts with an unmodulated time
of 75.52 µs followed by 32 pulses of
423.75 kHz.
Figure 20. Start of Frame, High Data Rate, One Subcarrier
113.28 µs
Figure 21. Start of Frame, Low Data Rate, One Subcarrier
37.76 µs
AI06671
453.12 µs
149.86 µs (ISO=151.04 µs)
AI06672
11/54
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LRI512.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LRI512 | Memory TAG IC 512 bit High Endurance EEPROM 13.56MHz / ISO 15693 Standard Compliant with E.A.S. | STMicroelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |