LRIS64K datasheet(21/100 Pages) STMICROELECTRONICS

部件名	LRIS64K

功能描述	64 Kbit EEPROM tag IC at 13.56 MHz with 64-bit UID and password based on ISO/IEC 15693 and ISO/IEC 18000-3 Mode 1

PDF	100 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

21 / 100 page

LRIS64K

Communication signal from VCD to LRIS64K

Doc ID 15336 Rev 11

21/100

Communication signal from VCD to LRIS64K

Communications between the VCD and the LRIS64K takes place using the modulation

principle of ASK (Amplitude Shift Keying). Two modulation indexes are used, 10% and

100%. The LRIS64K decodes both. The VCD determines which index is used.

The modulation index is defined as [a – b]/[a + b] where a is the peak signal amplitude and

b, the minimum signal amplitude of the carrier frequency.

Depending on the choice made by the VCD, a “pause” will be created as described in

Figure 3 and Figure 4.

The LRIS64K is operational for any degree of modulation index from between 10% and

30%.

Figure 3.

100% modulation waveform

Table 10.

10% modulation parameters

Symbol

Parameter definition

Value

0.1 x (a – b)

Max

0.1 x (a – b)

Max

105%

95%

60%

Carrier

Amplitude

Min (µs)

6,0

2,1

Max (µs)

9,44

4,5

0,8

The clock recovery shall be operational after t4 max.

ai15793

LRIS64K 数据表(PDF) 21 Page - STMicroelectronics

LRIS64K 数据表(HTML) 21 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

数据表下载