SI47XX-EVB Datasheet, PDF (58/164 Pages) Silicon Laboratories – Thank you for purchasing the Silicon Laboratories

Si47xx-EVB
value is set to anything other than 100%.
5. Clicking the "Add Time" button here will add the current time as a RDS Group Type 4 message to the GUI
FIFO Buffer queue.
6. Clicking the "Clear Buff & Send" button will upload the message from the FIFO Buffer Indicator Window
into the FIFO Buffer inside the device. The FIFO Buffer on the part will only send the messages contained
in the buffer once. A good example of using FIFO buffer is when you want to send the time data. Time is
something that occurs only once, so it will not be beneficial to upload time to the circular buffer and transmit
it continuously. Refer to step 5 for information on sending time data. Note that the messages in the FIFO
buffer will be transmitted only if the PS Mix value is set to anything other than 100%.
5.10.3. Advanced
In the advanced section, we will cover the remaining RDS topics.
1
2
3
4
5
8
6
7
9
Figure 48. Advanced RDS Sending Illustration
1. Dynamic: This tells whether the PTY code is static or dynamic.
2. Alternate Frequency: This provides the ability to inform the receiver of a single alternate frequency. This
field is transmitted along with the Group Type 0 (PS).
3. Miscellaneous bits in Group Type 0 (PS):
a. Artificial Head: 0 = Not Artificial Head; 1 = Artificial Head
b. Stereo: 0 = Mono; 1 = Stereo
c. Audio Compressor: 0 = Not compressed; 1 = Compressed
d. Traffic Program (TP): 0 = No TP; 1 = TP
e. Traffic Announcement (TA): 0 = No TA; 1 = TA
f. Speech: 0 = Speech; 1= Music
4. A/B Flag: This is an important flag in the RDS Group Type 2 (RT). Checking this box when a Radio Text is
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