m24lr64-r STMicroelectronics, m24lr64-r Datasheet - Page 50

• Manufacturer Part Number: m24lr64-r
• Description: 64 Kbit Eeprom With Password Protection & Dual Interface 400 Khz I?c Serial Bus & Iso 15693 Rf Protocol At 13.56 Mhz
• Manufacturer: STMicroelectronics

M24LR64-R to VCD frames
12
12.1
12.2
12.3
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M24LR64-R 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.
SOF when using one subcarrier
High data rate
The SOF includes an unmodulated time of 56.64 µs, followed by 24 pulses at 423.75 kHz
(f
at 423.75 kHz as shown in
Figure 35. Start of frame, high data rate, one subcarrier
For the Fast commands, the SOF comprises an unmodulated time of 28.32 µs, followed by
12 pulses at 423.75 kHz (f
9.44µs followed by 4 pulses at 423.75 kHz as shown in
Figure 36. Start of frame, high data rate, one subcarrier x2
Low data rate
The SOF comprises an unmodulated time of 226.56 µs, followed by 96 pulses at 423.75 kHz
(f
at 423.75 kHz as shown in
Figure 37. Start of frame, low data rate, one subcarrier
C
C
/32), and a logic 1 that consists of an unmodulated time of 18.88 µs followed by 8 pulses
/32), and a logic 1 that consists of an unmodulated time of 75.52 µs followed by 32 pulses
C
Figure
Figure
/32), and a logic 1 that consists of an unmodulated time of
Doc ID 15170 Rev 9
453.12µs
35.
37.
113.28µs
56.64µs
Figure
18.88µs
36.
ai12079
37.76µs
151.04µs
M24LR64-R
ai12078
ai12080