STFPC311(2012) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
STFPC311 Datasheet PDF : 39 Pages
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Remote control protocols
9
Remote control protocols
STFPC311
9.1
RC-5 remote control
RC-5 remote control protocol is based on Bi-phase (also known as Manchester) encoding
as shown in Figure 23.
Note:
The encoding is set with reference to the IR_DATA_IN signal (after the photo diode). The
MSB is transmitted first see Figure 24.
● The first two Start bits (S1 and S2) are synchronization bits. For normal operation, they
are always set to '11' on the transmission side. After the photo diode, there is one
inversion. The data at the IR_DATA_IN of the STFPC311 is shown in Figure 25 on
page 26
t(s) ● The next bit is the Toggle bit. This bit is inverted each time a key on the remote control
is pressed.
uc ● Bits A1 and A5 are the Address bits. The address bits indicate the intended application
d that the remote control protocol is used for.
ro ● Bits C1..C6 are the Command bits. The command bits instruct the STFPC311 as to
P what action is to be taken. The data representing the RC-5 protocol is sent as a byte of
te data which consists of a Toggle bit and a ‘0’ bit followed by 6 bits of Command data.
le Figure 23. Bi-phase encoding
Obsolete Product(s) - Obso Figure 24. RC-5 protocol frame
Figure 25. RC-5 reception example
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Doc ID 12324 Rev 2
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