LRI512 datasheet(9/54 Pages) STMICROELECTRONICS

Part #	LRI512

Description	Memory TAG IC 512 bit High Endurance EEPROM 13.56MHz, ISO 15693 Standard Compliant with E.A.S.

PDF	54 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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LRI512

BIT REPRESENTATION AND CODING

Data bits are encoded using Manchester coding,

according to the following schemes.

For the low data rate the same subcarrier frequen-

cy or frequencies are used, in this case the num-

ber of pulses shall be multiplied by 4 and all times

will increase by this factor.

Bit Coding Using One Subcarrier

High Data Rate. A logic 0 starts with 8 pulses of

423.75 kHz (fC/32) followed by an unmodulated

time of 18,88µs as shown in Figure 12.

Figure 12. Logic 0, High Data Rate

A logic 1 starts with an unmodulated time of

18.88 µs followed by 8 pulses of 423.75 kHz (fC/

32) as shown in Figure 13.

Figure 13. Logic 1, High Data Rate

Low Data Rate. A logic 0 starts with 32 pulses of

423.75 kHz (fC/32) followed by an unmodulated

time of 75.52 µs as shown in Figure 14.

Figure 14. Logic 0, Low Data Rate

A logic 1 starts with an unmodulated time of

75.52 µs followed by 32 pulses of 423.75 kHz (fC/

32) as shown in Figure 15.

Figure 15. Logic 1, Low Data Rate

AI06663

37.76 µs

AI06664

37.76 µs

AI06666

149.86 µs (ISO=151.04 µs)

AI06665

149.86 µs (ISO=151.04 µs)

LRI512 Datasheet(PDF) 9 Page - STMicroelectronics