TDA5240 Datasheet, PDF (97/284 Pages) Infineon Technologies AG – Enhanced Sensitivity Multi-Channel Quad-Configuration Receiver

TDA5240
Functional Description
Configurations are switched via SFR bit group MCS in the CMC0 register. The RF
channel in use can be selected in the x_CHCFG register, the frequency selection is
defined by SFRs x_PLLINTCy, x_PLLFRAC0Cy, x_PLLFRAC1Cy, x_PLLFRAC2Cy,
where x = A, B, C or D and y = 1, 2 or 3.
The configuration may be changed only in SLEEP or in HOLD Mode before returning to
the previously selected operation mode. This is necessary to restart the state machine
with defined settings at a defined state. Otherwise the state machine may hang up.
Reconfigurations in HOLD Mode are faster, because there is no Start-Up sequence.
The following flowchart and explanation show and help to understand the internal
behavior of the Finite State Machine (FSM) in Run Mode Slave.
Data Sheet
97
V4.0, 2010-02-19