TDA5231XT Infineon Technologies, TDA5231XT Datasheet - Page 56

• Manufacturer Part Number: TDA5231XT
• Manufacturer: Infineon Technologies

Specifications of TDA5231XT

• Operating Temperature (min): -40C
• Operating Temperature (max): 105C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 4.4mm
• Product Length (mm): 9.7mm
• Lead Free Status / Rohs Status: Compliant

Figure 24
Calculation Example
For all calculation examples for On and Off Time we will use following example data:
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•
•
•
•
•
Calculation of the Master Period Time (T
T
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Imagine, the transmission of the Wake Up Pattern starts very little time after the receiver
starts polling on this channel. Using our example data, the receiver recognizes only 19
chips out of the required 20, but then the State Machine switches to the next channel.
Therefore, the Master Period Time has to be short enough that inside of the (shorter)
transmitted Wake Up Pattern, this channel can be successfully polled again.
1) Calculation of Wake Up Times for Each Configuration and Channel:
Data Sheet
RX polling
RX polling
RX polling
MasterPeriod
sleep mode
sleep mode
sleep mode
Configuration A and B used
Three channels to be scanned in Configuration A, two channels in Configuration B
Configuration A Data Rate 10 kb/s, +/-10%, Configuration B Data Rate 5 kb/s, +/-10%
Length of usable Wake Up Pattern is 2000 bits (for both Data Rates)
Wake Up Criterion requires 10 bits equal to 20 chips
f
is 0.576 ms, Channel Hop Latency is 0.06 ms
Length/duration of transmitted Wake Up Pattern
Data Rate and tolerance
Length/duration of Wake Up criterion
sys
run mode
run mode
run mode
is 13.225625 MHz (used for 433.92 MHz RF), this means Receiver Start Up Time
T
T
T
A
AON
A
AON
A
AON
1
1
1
Single Channel, Single Config
Multi Channel, Single Config
Multi Channel, Dual Config
depends on:
T
T
A
AON
A
AON
2
2
Constant On/Off Time
T
T
A
AON
A
AON
3
3
T
MasterPeriod
T
T
T
T
BON
B
1
MasterPeriod
MasterPeriod
OFF
T
BON
B
2
T
OFF
T
OFF
(Chapter 2.4.12 Wake Up Generation
52
MasterPeriod
).
Channels = 1
T
Channels = m
T
Channels Config A = m
Channels Config B = n
T
MasterPeriod
MasterPeriod
MasterPeriod
Functional Description
= T
= m*T
= m*T
AON
Version 4.0, 2007-06-01
AON
AON
+ T
+ T
+ n*T
OFF
OFF
BON
+ T
TDA523x
OFF
Unit)