m24lr16e-r STMicroelectronics, m24lr16e-r Datasheet - Page 46

• Manufacturer Part Number: m24lr16e-r
• Description: 16 Kbit Eeprom With Password Protection, Dual Interface & Energy Harvesting 400 Khz I²c Bus & Iso 15693 Rf Protocol At 13.56 Mhz
• Manufacturer: STMicroelectronics

Communication signal from VCD to M24LR16E-R
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Communication signal from VCD to M24LR16E-R
Communications between the VCD and the M24LR16E-R takes place using the modulation
principle of ASK (Amplitude shift keying). Two modulation indexes are used, 10% and 100%.
The M24LR16E-R 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” is created as described in
and
The M24LR16E-R is operational for the 100% modulation index or for any degree of
modulation index between 10% and 30% (see
Figure 14. 100% modulation waveform
The clock recovery shall be operational after t
Figure
105%
95%
60%
5%
15.
Amplitude
a
b
Carrier
Doc ID 018932 Rev 7
t
1
t
2
t
4
4
t
max.
3
Table
124).
t
t
t
t
t
1
2
3
4
Min (µs)
ai15793
6,0
2,1
0
0
M24LR16E
Figure 14
Max (µs)
9,44
4,5
0,8
t
1