STFPC320 STMicroelectronics, STFPC320 Datasheet - Page 52

• Manufacturer Part Number: STFPC320
• Description: Front Panel Controller/driver With Standby Power Management And Real-time Clock
• Manufacturer: STMicroelectronics

Remote control protocols
15.4.1
15.4.2
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NEC 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.
Example for NEC protocol, if the 8-bit ADDR field is “00000010” and 8-bit command is
“00011111”, the in decoded format the data on SDA pin will be sent as follows with MSB
transmitted first.
NEC 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 Philips RC-5
protocol, the data on SDA pin in raw-format will be as follows:
LSB
8-bit Address
Byte 1
Byte 2
Byte 3
MSB
LSB
Inverted 8-bit
address
MSB
S
S
0
0
1
1
MSB
LSB
T
T
0
0
1
1
LSB
8-bit command
MSB
X
X
0
0
0
0
X
X
0
0
0
0
ADR
MSB
X
X
0
0
0
0
LSB
DATA
Inverted 8-bit
X
X
0
0
1
1
command
X
X
1
1
1
1
Sent first on SDA
MSB
LSB
X
X
0
0
1
1
STFPC320