TDA5240 Datasheet, PDF (120/284 Pages) Infineon Technologies AG – Enhanced Sensitivity Multi-Channel Quad-Configuration Receiver

TDA5240
Functional Description
Calculation of the Off time:
The same general rules apply as for Constant On-Off Time. The Off time has to be short
enough that no wake-up pattern reception is missed.
2.6.2.4 Mixed Mode (MM, Const On-Off & Fast Fall Back to SLEEP)
This mode combines Constant-On Time and Fast Fall Back to SLEEP within different
configuration sets: Cfg.A: COO; Cfg.B: FFB; Cfg.C: FFB; Cfg.D: FFB
T_ON for Configuration A is always calculated according to Const On-Off rules.
T_ON for Configuration B, C and D is always calculated according to Fast Fall Back to
SLEEP rules.
In Mixed Mode the On time of the first configuration within the FFB group is used. Below
there are shown the same scenarios as before, but now for Mixed Mode. Note that
Single-Configuration can be set, but is not recommended in Mixed Mode.
Only the following receive modes (see Chapter 2.5.1.2 Data Interface) can be used:
• Packet Oriented FIFO Mode (POF)
• Packet Oriented Transparent Payload Mode (POTP)
• Transparent Mode - Chip Data and Strobe (TMCDS)
Single Channel, Single Config
run mode
RX polling
A
1
sleep mode
TAON
TBON
TOFF
TMasterPeriod
Multi Channel, Single Config
run mode
RX polling
A
1
A
2
A
3
sleep mode
TAON TAON TAON
TBON
TOFF
TMasterPeriod
Multi Channel, Multi Config
run mode
RX polling
A
1
A
2
ABB
312
sleep mode
TAON TAON TAON _TBON
TMasterPeriod
Figure 85 Mixed Mode
TOFF
Channels = 1
T_MasterPeriod = T_AON + T_BON + T_OFF
Channels = m
T_MasterPeriod = m*T_AON + T_BON + T_OFF
Channels Config A = m
Channels Config B = n
T_MasterPeriod = m*T_AON + T_BON+ T_OFF
Data Sheet
120
V4.0, 2010-02-19