STFPC320 datasheet(51/78 Pages) STMICROELECTRONICS

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STFPC320

Remote control protocols

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Remote control protocols

15.1

Decoded and RAW formats

The main difference between decoded and raw remote-control format is that for decoded

format, the STFPC320 sends the RC data only from RC device address matches 0 of the

remote control protocol being used. Whereas for the raw format, the RC data is sent by

STFPC320 from any device address of the particular remote control protocol being used.

If the STFPC320 is used to send RC data in decoded format in normal mode, it is advisable

that the Host configure the STFPC320 to RC-raw format before entering the standby mode.

This is to allow wakeup from multiple remote control device addresses of the remote control

protocol (depending on the configuration as outlined in Section : on page 40). In the

decoded RC format, the STFPC320 device wakes up the system from a single device

address.

15.2

Sending IR data on I2C interface

The IR data is sent on the SDA pin of the I2C interface when the microprocessor issues an

IR data read command (0x62, Section 7.2: Data setting command on page 36). The data is

sent in the decoded format or the raw format depending on the user configuration.

In general, the data is sent on SDA pin in byte format with MSB transmitted first as shown in

Figure 24.

IR data format

Byte 1

Byte 2

Byte 3

Data word

MSB

LSB MSB

LSB

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