ISD-T360SB Datasheet, PDF (66/109 Pages) List of Unclassifed Manufacturers – VoiceDSP Digital Speech Processor with Master/Slave, Full-Duplex Speakerphone, Multiple Flash and ARAM/DRAM Support

ISD-T360SB
2—SOFTWARE
Echo cancellation improves the performance of DTMF detection during playback. Echo cancellation
can be turned on only with a system that can disable HW AGC (if present) during playback. A system
featuring HW AGC, that cannot be controlled by the microcontroller (i.e., disabled or enabled), must
not turn on this bit.
Bit 16
Clock bit rate (in Slave Mode only).
0
One bit rate clock (default).
1
Two bit rate clock.
Bit 17
Codec configuration.
0
Short-frame format (default).
1
Long-frame format (guaranteed by design but not tested).
Bits 18–19
Codec type.
00 16-bit linear (default).
01 µ-Law.
10 A-Law.
Bit 20
Codec interface mode.
0
Master codec interface (default).
1
Slave codec interface.
Bits 21–22
Number and type of codecs
00 One single codec (default).
01 Two single codecs.
10 One dual codec.
11 Reserved.
The codecs should be connected as follows:
Telephone line or equivalent - always connected as channel 0.
Speaker and microphone - connected as channel 1 in case of one dual codec (not applicable in
slave mode), connected as channel 2 in case of two single codecs.
2-26
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