TDA5252G2 Datasheet, PDF (55/86 Pages) Infineon Technologies AG – ASK/FSK 915MHz Wireless Transceiver

TDA5252 G2
Version 1.1
Application
3.2.6 Finetuning and FSK modulation relevant registers
Case FSK-RX or ASK-TX (C_tune2):
Table 3-4
Bit
D5
D4
D3
D2
D1
D0
Sub Address 02H: XTAL_TUNING
Function
Value
Nominal_Frequ_5
8pF
Nominal_Frequ_4
4pF
Nominal_Frequ_3
2pF
Nominal_Frequ_2
1pF
Nominal_Frequ_1
500fF
Nominal_Frequ_0
250fF
Description
Setting for
nominal
frequency
ASK-TX
FSK-RX
(Ctune2)
Default
0
1
0
0
1
0
Case FSK-TX or ASK-RX (C_tune1 and C_tune2):
Table 3-5
Bit
D13
D12
D11
D10
D9
D8
D5
D4
D3
D2
D1
D0
Sub Address 01H: FSK
Function
FSK+5
FSK+4
FSK+3
FSK+2
FSK+1
FSK+0
FSK-5
FSK-4
FSK-3
FSK-2
FSK-1
FSK-0
Value
8pF
4pF
2pF
1pF
500fF
250fF
4pF
2pF
1pF
500fF
250fF
125fF
Description
Setting for
positive
frequency
shift: +FSK
or ASK-RX
(Ctune2)
Setting for
negative
frequency
shift: -FSK
(Ctune1)
Default
0
0
1
0
1
0
0
0
1
1
0
0
Default values
In case of using the evaluation board, the crystal with its typical parameters (fp=19,0625MHz,
. ^{C1=8fF, C0=2,1pF, CL=20pF) and external capacitors with Cv1=8.2pF, Cv2=6.8pF, Cv3=22pF}
each are used the following default states are set in the device
Table 3-6 Default oscillator settings
Operating state
Frequency
ASK-TX / FSK-RX
915 MHz
+FSK-TX / ASK-RX
+50 kHz
-FSK-TX
-50 kHz
Data Sheet
55
2007-02-26