TDA5230 Datasheet, PDF (63/186 Pages) Infineon Technologies AG – Universal Low Power ASK/FSK Single Conversion Multi-Channel Image-Reject Receiver

TDA523x
Functional Description
the beginning (Config A, Channel 1) until the on time has elapsed. The timing calculation
can be seen in the next figure. Note that Permanent Wake Up Search makes sense only
in the Const On/Off Mode.
Single Channel, Single Config
run mode
RX
polling
A
1
sleep mode
A A A AA
1 1 1 11
TON
TOFF
TMasterPeriod
Channels = 1
TMasterPeriod = TON + TOFF
Multi Channel, Single Config
run mode
RX polling
A
1
A
2
A
3
AA A A
12 3 1
sleep mode
TON
TOFF
TMasterPeriod
Channels = m
TMasterPeriod = TON + TOFF
TON= m*TAON
Multi Channel, Dual Config
run mode
RX
polling
A
1
A
2
A
3
BB
12
A
1
A
2
sleep mode
TON
TOFF
TMasterPeriod
Channels Config A = m
Channels Config B = n
TMasterPeriod = TON+ TOFF
TON= m*TAON + n*TBON
Figure 27 Permanent Wake Up Search
Note: Calculation of On/Off Time and Master Period is equal to Fast Fall Back to Sleep
Wake Up Mode.
2.4.6.6 Active Idle Period Selection
This is used to deactivate some polling periods. Normally, the polling starts again after
the T_MasterPeriod. With this Active-Idle Period selection, some of the polling periods can be
deactivated independently from the polling mode. The active and idle sequences are set
with the SPMAP and the SPMIP registers. The values of these registers determine the
factors M and N.
Data Sheet
59
Version 4.0, 2007-06-01