LRI64 datasheet(7/38 Pages) STMICROELECTRONICS

部件名	LRI64

功能描述	Memory TAG IC, 64-bit Unique ID with WORM User Area 13.56MHz, ISO15693 and ISO18000-3 Mode 1 Compliant

PDF	38 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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LRI64

COMMUNICATION SIGNAL FROM VCD TO LRI64

Communications between the VCD and the LRI64

involves a type of Amplitude Modulation called

Amplitude Shift Keying (ASK).

The LRI64 only supports the 10% modulation

mode specified in ISO 15693 and ISO 18000-3

Mode 1 standards. Any request that the VCD

might send using the 100% modulation mode, is

ignored, and the LRI64 remains in its current state.

However, the LRI64 is, in fact, operational for any

degree of modulation index from between 10%

and 30%.

The modulation index is defined as (a-b)/(a+b)

where a and b are the peak and minimum signal

amplitude, respectively, of the carrier frequency,

as shown in Figure 5.

Table 2. 10% Modulation Parameters

Figure 5. 10% Modulation Waveform

Figure 6. “1-out-of-4” Coding Example

Parameter

Min

Max

–

0.1 x (a-b)

–

0.1 x (a-b)

AI06655B

tRFF

tRFSFL

tRFR

AI06659B

75.52 µs

LRI64 数据表(PDF) 7 Page - STMicroelectronics

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