Datasheet

Functional description ST7540
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6.8 Control register
The ST7540 is a multi-channel and multifunction transceiver. An internal 24 or 48 Bits (in
Extended mode) Control Register allows to manage all the programmable parameters
(Table 1 2 ).
The programmable functions are:
Channel Frequency
Baud Rate
Deviation
Watchdog
Transmission Timeout
Frequency Detection Time
Detection Method
Mains Interfacing Mode
Output Clock
Sensitivity Mode
Input Pre-Filter
In addition to these functions the Extended mode provides 24 additional bits and others
functions:
Output Level Freeze
Frame Header Recognizes (one 16 bits header of or two 8 bits headers) with support to
Frame Length Bit count