STFPC320 STMicroelectronics, STFPC320 Datasheet - Page 54

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

Remote control protocols
15.5.1
15.5.2
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Sony 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 Sony protocol, if the 5-bit custom code is “11000” and 7-bit data code is
“1010100”, the in decoded format the data on SDA pin will be sent as follows with MSB
transmitted first.
Sony 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. If a valid SYN pulse is detected, it is
represented by a bit ‘1’. So a first bit with value ‘1’ implies that the data following it is a valid
raw format RC data. So for the above example for Sony protocol, the data on SDA pin in
raw-format will be as follows:
Byte 1
Byte 2
Byte 3
Sent first on SDA
MSB
1
1
0
0
X
X
MSB
1
1
1
1
X
X
Data code
DATA
ADR
7-bit
0
0
0
0
X
X
0
0
1
1
LSB
X
X
LSB
MSB
0
0
0
0
X
X
Custom code
LSB
S
S
0
0
5-bit
X
X
X
X
T
T
X
X
LSB
MSB
X
X
1
1
X
X
STFPC320