TDA5230XT Infineon Technologies, TDA5230XT Datasheet - Page 59

• Manufacturer Part Number: TDA5230XT
• Manufacturer: Infineon Technologies

Specifications of TDA5230XT

• 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 25
Calculation Example
The same example data is used as for Constant On/Off Time:
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Calculation of the Master Period Time (T
The Master Period Time has to be short enough that inside of the (shorter) transmitted
Wake Up Pattern, the channel with the longest Wake Up sequence can be polled twice.
This calculation is equal to the calculation in Constant On/Off Time.
1) Calculation of Wake Up Times for Each Configuration and Channel:
T
T
T
T
T
Data Sheet
WakeUp_ConfigAChannel1
WakeUp_ConfigAChannel2
WakeUp_ConfigAChannel3
WakeUp_ConfigBChannel1
WakeUp_ConfigBChannel2
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
sys
is 13.225625 MHz (used for 433.92 MHz RF), this means Receiver Start Up Time
RX polling
RX polling
RX polling
sleep mode
sleep mode
sleep mode
run mode
run mode
run mode
Fast Fall Back to Sleep
Single Channel, Single Config
A
A
A
1
1
1
Multi Channel, Single Config
Multi Channel, Dual Config
A
A
2
2
=0.576 ms+(7.625 bits+10 bits)/(10kb/s*0.9)=2.55 ms
=0.06 ms+(7.625 bits+10 bits)/(10kb/s*0.9)=2.02 ms
=0.06 ms+(7.625 bits+10 bits)/(10kb/s*0.9)=2.02 ms
=0.06 ms+(7.625 bits+10 bits)/(5kb/s*0.9)=3.98 ms
=0.06 ms+(7.625 bits+10 bits)/(5kb/s*0.9)=3.98 ms
T
T
A
A
3
3
T
AON
AON
AON
B
1
B
2
T
T
T
MasterPeriod
MasterPeriod
MasterPeriod
T
T
OFF
OFF
T
OFF
55
MasterPeriod
)
Channels = 1
T
Channels = m
T
Channels Config A = m
Channels Config B = n
T
MasterPeriod
MasterPeriod
MasterPeriod
Functional Description
Version 4.0, 2007-06-01
= T
= T
= T
AON
AON
AON
+ T
+ T
+ T
TDA523x
OFF
OFF
OFF