LRI512 datasheet(6/54 Pages) STMICROELECTRONICS

部件名	LRI512

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

PDF	54 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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6 / 54 page

LRI512

6/54

Data Coding Mode: 1 Out of 4

The value of 2 bits is represented by the position

of one pause. The position of the pause on 1 of 4

successive time periods of 18.88 µs (256/fC), de-

termines the value of the 2 bits. Four successive

pairs of bits form a byte, where the least significant

pair of bits is transmitted first.

In this case the transmission of one byte takes

302.08 µs and the resulting data rate is 26.48 kbit/

s (fC/512). Figure 7 illustrates the 1 out of 4 pulse

position technique and coding.

Figure 7. 1 Out of 4 Coding Mode

For example Figure 8 shows the transmission of

E1h (225d, 1110 0001b) by the VCD.

Figure 8. 1 Out of 4 Coding Example

AI06658

9.44 µs

75.52 µs

28.32 µs

9.44 µs

75.52 µs

47.20µs

9.44 µs

75.52 µs

66.08 µs

9.44 µs

75.52 µs

Pulse position for "00"

Pulse position for "11"

Pulse position for "10" (0=LSB)

Pulse position for "01" (1=LSB)

AI06659

75.52 µs

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