STFPC320 datasheet(64/78 Pages) STMICROELECTRONICS

Part #	STFPC320

Description	Front panel controller/driver with standby power management and real-time clock

PDF	78 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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64 / 78 page

Remote control protocols

STFPC320

64/78

15.8.1

RCA in decoded format

In the decoded form, the ADR bits followed by Start bit and Toggle Bit followed by Data bits

are sent in this order for each remote control protocol. The number of bits depends on the

corresponding RC protocol. The remaining empty bits are stuffed with 1’s to complete a

byte-aligned data frame.

For RCA protocol, if the 4-bit ADR is “1101” and 7-bit command bits is “1010100”, the in

decoded format the data on SDA pin will be sent as follows with MSB transmitted first.

Figure 44.

RCA data structure in decoded format

15.8.2

RCA in RAW format

In the raw form, the data is sent in the same way as it is received for each RC protocol

except that the header is not transmitted on SDA. So for the above example for RCA

protocol, the data on SDA pin in raw-format will be as follows:

Figure 45.

RCA data structure in raw format

MSB

DATA

LSB

Byte 1

Byte 2

Byte 3

LSB

ADR

Toggle Bit

ADR

4-bit

LSB

MSB

LSB

MSB

Command

7-bit

Sent first on SDA

STFPC320 Datasheet(PDF) 64 Page - STMicroelectronics