LRI2K-A1T/1GE STMicroelectronics, LRI2K-A1T/1GE Datasheet - Page 20

• Manufacturer Part Number: LRI2K-A1T/1GE
• Manufacturer: STMicroelectronics

Specifications of LRI2K-A1T/1GE

• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Not Compliant

Bit representation and coding
5
5.1
5.1.1
20/86
Bit representation and coding
Data bits are encoded using Manchester coding, according to the following schemes. 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 and all times are increased by this factor. For the Fast
commands using one subcarrier, all pulse numbers and times are divided by 2.
Bit coding using one subcarrier
High data rate
A logic 0 starts with 8 pulses at 423.75 kHz (f
18.88 µs as shown in
Figure 12. Logic 0, high data rate
For the Fast commands, a logic 0 starts with 4 pulses at 423.75 kHz (f
unmodulated time of 9.44 µs as shown in
Figure 13. Logic 0, high data rate x2
A logic 1 starts with an unmodulated time of 18.88 µs followed by 8 pulses at 423.75 kHz
(f
Figure 14. Logic 1, high data rate
For the Fast commands, a logic 1 starts with an unmodulated time of 9.44 µs followed by 4
pulses at 423.75 kHz (f
Figure 15. Logic 1, high data rate x2
C
/32) as shown in
Figure
Figure
C
/32) as shown in
14.
12.
37.76µs
37.76µs
Figure
Figure
18.88µs
18.88µs
C
/32) followed by an unmodulated time of
15.
13.
ai12066
ai12067
ai12077
ai12076
C
/32) followed by an
LRI2K