LRIS2K_11 Datasheet, PDF (29/98 Pages) STMicroelectronics – 2048-bit EEPROM tag IC at 13.56 MHz, with 64-bit UID and Password, ISO15693 and ISO18000-3 Mode 1 compliant

LRIS2K
8
LRIS2K to VCD frames
LRIS2K to VCD frames
Frames are delimited by an SOF and an EOF. They are implemented using code violation.
Unused options are reserved for future use. For the low data rate, the same subcarrier
frequency or frequencies is/are used. In this case the number of pulses is multiplied by 4.
For the Fast commands using one subcarrier, all pulse numbers and times are divided by 2.
8.1
SOF when using one subcarrier
8.2
High data rate
The SOF includes an unmodulated time of 56.64 µs, followed by 24 pulses at 423.75 kHz
(f_C/32), and a logic 1 that consists of an unmodulated time of 18.88 µs followed by 8 pulses
at 423.75 kHz as shown in Figure 23.
Figure 23. Start of frame, high data rate, one subcarrier
113.28µs
37.76µs
ai12078
For the Fast commands, the SOF comprises an unmodulated time of 28.32 µs, followed by
12 pulses at 423.75 kHz (f_C/32), and a logic 1 that consists of an unmodulated time of
9.44µs followed by 4 pulses at 423.75 kHz as shown in Figure 24.
Figure 24. Start of frame, high data rate, one subcarrier x2
56.64µs
18.88µs
ai12079
Doc ID 13888 Rev 9
29/98