TDA5252G2 INFINEON [Infineon Technologies AG], TDA5252G2 Datasheet - Page 68

• Manufacturer Part Number: TDA5252G2
• Description: ASK/FSK 915MHz Wireless Transceiver
• Manufacturer: INFINEON [Infineon Technologies AG]

As an example a desired RSSI threshold voltage of 500mV results in TH3~26=011010 b , which has
to be written into D0 to D5 of the RSSI_TH3 register (sub address 08H).
Default value (RSSI detection inactive):
TH3=111111 b
3.8
ON= (2
OFF=( 2
f
Example: t
ON= 65535-(32300*0,005) ~ 65373= 1111111101011101
OFF= 65535-(32300*0,055) ~ 63758= 1111100100001110
The values have to be written into the D0 to D15 bits of the ON_TIME and OFF_TIME registers
(subaddresses 04H and 05H).
Default values:
ON= 65215 = 1111111011000000
OFF= 62335 = 1111001110000000
t
t
3.9
The settings for Self Polling Mode depend very much on the timing of the transmitted Signal. To
create an example we consider following data structure transmitted in FSK.
Data Sheet
RC
ON
OFF
= Frequency of internal RC Oszillator
~10ms @ f
~100ms @ f
16
16
-1)-(f
-1)-(f
ON
Calculation of ON_TIME and OFF_TIME
Example for Self Polling Mode
= 0,005s, t
RC
RC
RC
TH3
*t
RC
= 32kHz
*t
ON
OFF
= 32kHz
=
)
desired
)
OFF
= 0,055s, f
RSSI
b
b
1.2V
threshold
RC
= 32300Hz
voltage
68
⋅
(
2
6
b
−
b
) 1
[3 – 40]
[3 – 41]
[3 – 39]
TDA5252 G2
Version 1.1
Application
2007-02-26