User guide

Si471x-EVB

Preliminary Rev. 0.4 35

6.8.3. Advanced

Figure 31. Advanced RDS Sending Message 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 uploaded means

that the RT is uploaded with the flag set. Unchecking this box when an RT is uploaded means that the flag is not set. This

flag tells the receiver that when the flag toggles from set to reset or vice versa, the receiver will clear the display before

showing the next RT.

5. Manual Group Entry: This is the box if used needs to upload the RDS data manually. User can use this box for uploading

message from Group Type that the Si47xx GUI does not have encoding support, in which users has to encode the message

into hexadecimal code by themselves.

6. Circular Buffer Indicator: This displays the message that gets uploaded into the Circular Buffer in hexadecimal code. This

can be useful to see how the Group Type 0 (PS), Type 2 (RT), and Type 4 (CT) is encoded into RDS data.

7. Delete Circular Buffer Group: This deletes a group that is selected in the Circular Buffer Indicator.

8. FIFO Buffer Indicator: This displays the message that gets uploaded into the FIFO buffer in hexadecimal code.

9. Delete FIFO Buffer Group: This deletes a group that is selected in the FIFO Buffer Indicator.