tda5225 Infineon Technologies Corporation, tda5225 Datasheet - Page 57
tda5225
Manufacturer Part Number
tda5225
Description
Enhanced Sensitivity Multi-channel Quad-conf Igurat Ion Receiver With Digital Slicer
Manufacturer
Infineon Technologies Corporation
Datasheet
1.TDA5225.pdf
(176 pages)
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2.6
The System Management Unit consists of two main units:
•
•
2.6.1
2.6.1.1
The Master Control Unit controls the operation modes and the global states.
The transparent data stream can be processed externally by the Application Controller
(see
The following operation modes and the behavior of the Master Control Unit are fully
automatic and only influenced by SFR settings and by incoming RF data streams.
The TDA5225 has two major operation modes, which are switched by SFR bit MSEL.
In Slave Mode the device is controlled via SPI by the external microcontroller. This mode
supports:
•
•
•
In Slave Mode, switching between configurations and channels, as well as between Run
and SLEEP Mode must be initiated by the microcontroller.
In Self Polling Mode, TDA5225 autonomously polls for incoming RF signals. The
receiver switches automatically between up to four configurations (Configuration A, B, C
and D) and up to 3 channels per configuration (Further information can be found in
Chapter
Between the RF signal scans, the receiver is automatically switched to Low Power Mode
for reducing the average power consumption. If an incoming signal fulfills the selected
wake-up criterion an interrupt can be generated and Run Mode Self Polling will be
entered.
Data Sheet
Master Control Unit, where the various operating modes can be configured.
Polling Timer Unit, where the receiver’s On and Off times and modes are defined.
The Polling Timer Unit is only working in the Self Polling Mode.
Run Mode Slave
SLEEP
also be used to change register settings
HOLD
back to RMS is faster than changing to SLEEP Mode and back to RMS.
Chapter 2.5.1.2 Data
2.6.2).
Mode, allows register settings to be changed. The change to HOLD Mode and
System Management Unit (SMU)
Master Control Unit (MCU)
Overview
Mode, where the receiver is switched off for power saving. This mode can
(RMS), where the receiver is continuously active
Interface).
57
Functional Description
V1.0, 2010-02-19
TDA5225
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