TDA5230 Datasheet, PDF (155/186 Pages) Infineon Technologies AG – Universal Low Power ASK/FSK Single Conversion Multi-Channel Image-Reject Receiver

TDA523x
Register Descriptions
Dual: ADATFILT1 and BDATFILT1: Matched Filter Decimation
ADDR: 0x70 and 0x90
Reset Value: 0x00
Bit R/W Description
5:0 W ASKDEC: CIC-filter Decimation Factor:
Choose the highest possible ADC sampling rate for the best performance
ASKDEC
=
ro
u
nd


1----6-f--^A-⋅^---Df--_d^--C-_a^--_t^--_a^
–
1
f_ADC
=
--------------f--^s--^y---^s-------------
ADCDIV + 1
Dual: ASIGDET0 and BSIGDET0: Signal detector (Run Mode)
ADDR: 0x71 and 0x91
Reset Value: 0x00
Bit R/W Description (For detailed procedure refer to Application Notes.)
7:6 W SDCNT: Signal Detector Threshold Counter (Run Mode)
use 00b: disabled
5:0 W SDTHR: Signal Detector Threshold Level (Run Mode)¹⁾
See application notes “How to choose an Application specific Signal Detection
Threshold for TDA523x based ASK Mode Applications” and “How to Choose an
Application Specific Signal- and Noise-Detection Threshold for TDA523x based FSK
Mode Applications” for specific procedure to determine this threshold by application.
1) For threshold calculation use the ASKNP: ASK Noise Power register.
Dual: ASIGDET1 and BSIGDET1: Signal detector (Wake Up)
ADDR: 0x72 and 0x92
Reset Value: 0x00
Bit R/W Description (For detailed procedure refer to Application Notes.)
7:6 W SDCNT: Signal Detector Threshold Counter (Wake Up)
use 00b: disabled
5:0 W SDTHR: Signal Detector Threshold Level (Wake Up)
See application notes “How to choose an Application specific Signal Detection
Threshold for TDA523x based ASK Mode Applications” and “How to Choose an
Application Specific Signal- and Noise-Detection Threshold for TDA523x based FSK
Mode Applications” for specific procedure to determine this threshold by application.
Data Sheet
151
Version 4.0, 2007-06-01