TDA5225 Datasheet, PDF (47/176 Pages) Infineon Technologies AG – Enhanced Sensitivity Multi-Channel Quad-Configuration Receiver

TDA5225
Functional Description
When the actual processed configuration is the last configuration before the Off time,
then the next programmed channel within the polling cycle would be the sequence of the
Off time.
When data is available and the RSSI is within a valid threshold area, an interrupt is
generated (NINT). So the Application Controller can process the data and decide about
valid data.
In case the controller decides that wrong data was sent, the microcontroller can send the
register command "EXTTOTIM" (see Figure 43 and EXTPCMD register).
When the microcontroller detects valid data, then the controller can send the register
command "EXTEOM found" (see Figure 43 and EXTPCMD register) after completing
the data reception.
The functionality described above can also be used for the receive mode TMMF, where
the external microcontroller takes on responsibility for further data processing.
SelfPolling Mode
SelfPolling scenario
Sleep Mode
ConfigA
ConfigB
OFF-time
Interrupt signal
for RSSI
RunMode SelfPolling
SelfPolling / Sleep
RSSI level too low Î
Chip stays in Self Polling Mode
and sends no interrupt
Interrupt signal
for RSSI
RunMode SelfPolling
SelfPolling / Sleep
µC detects invalid data and sends
„EXTTOTIM“Î goto SPM
Interrupt signal
for RSSI
RunMode SelfPolling
SelfPolling / Sleep
Figure 24 External Data Processing
µC finished data reception,
sends „EXTEOM found“
Data Sheet
47
V1.0, 2010-02-19