tda5235 Infineon Technologies Corporation, tda5235 Datasheet - Page 101

• Manufacturer Part Number: tda5235
• Description: Enhanced Sensitivity Double-configuration Receiver With Digital Baseband Processing
• Manufacturer: Infineon Technologies Corporation

TDA5235
Functional Description
The Polling Timer Unit controls the timing for scanning (On time) and sleeping (Off
time, SPM_OFF). Up to two independent configuration sets (A and B) can automatically
be processed, thus enabling scanning from different transmit sources. See also
Chapter 2.6.2 Polling Timer
Unit.
The Wake-Up Generation Unit identifies, whether an incoming data stream matches
the configurable wake-up criterion.
After fulfillment of the wake-up criterion, modulation can be switched automatically.
See also
Chapter 2.6.1.6 Automatic Modulation
Switching,
Chapter 2.4.8.5 Wake-
Up Generator
and
Chapter 2.5.1.2 Data Interface
(in Subsection TMRDS).
The following state diagrams and explanations help to illustrate the behavior during Self
Polling Mode. First there is a search for a wake-up criterion according to Configuration
A. Then, there is an optional search for a wake-up criterion according to Configuration B.
In applications using only Single-Configuration, settings are always taken from
Configuration A.
Data Sheet
101
V1.0, 2010-02-19