AMBE-1000 Digital Voice Systems, Inc., AMBE-1000 Datasheet - Page 49

• Manufacturer Part Number: AMBE-1000
• Manufacturer: Digital Voice Systems, Inc.

5.3
A/D-D/A Type
Generic law
Generic Alaw
Lucent CSP1027
(Mic In)
Lucent CSP1027
(Aux In)
TI TLC32046
Generic 16 bit
Linear
note 1 : See Table 4-N and Table 4-O for SOIC functionality.
note 2 : See Table 5-B for pin directions.
note 3 : Special Linear mode, zeros out 2 LSB’s, typical interface for TI codecs.
note 4 : If Control Frame with ID=0x03 is used, then use Control_3 = 0x0001.
note 5 : If Control Frame with ID=0x03 is used, then use Control_3 = 0xFFFD.
The AMBE-1000 is not recommended for new designs.
Please refer to the AMBE-2000/2020 product line.
The A/D-D/A Command packet fits into the basic frame format.
format to configure the codec the user must also be aware that it is the same interface
that controls the Voice Activation/Detection (VAD) as well as the Echo Cancellation
Enable. See section 4.1.14.4 for the full description of this command interface.
Configuring the A/D-D/A Interface using C_SEL[2-0]
In order to simplify the process of configuring the A/D-D/A interface certain preset
configurations are available to the user.
through the 3 hardware pins C_SEL[2-0]. In Table 5-A, the 3 digit binary value for
C_SEL[2-0] corresponds to the levels present on the hardware pins, with a 0
corresponding to GND, and a 1 corresponding to V
5-A, no additional control information is needed, although if the A/D-D/A Command
word is used the information in Table 5-A must be repeated within the command word.
Table 5-A C_SEL[2-0] : A/D-D/A Hardware Configuration Values
The AMBE-1000™ Vocoder Chip has a special Linear mode for typical Texas
Instruments A/D-D/A chips which zeros out the 2 LSB’s of each data sample. Many TI
codecs, such as the TLC32046, require the zeroing out of the 2 LSB’s in each data
sample.
C_SEL[2-0] pins with the TI settings.
In the absence of subsequent A/D-D/A Command words, the C_SEL[2-0] pins
determine the AMBE-1000™ Vocoder Chip’s serial I/O interface. Table 5-B shows the
direction of each of the signals for the preset A/D-D/A configurations.
If you are using a TI linear A/D-D/A with an equivalent interface use the
The AMBE-1000 is not recommended for new designs.
C_SEL[2-0]
90, 89, 88
Please refer to the AMBE-2000/2020 product line.
000b
100b
001b
101b
010b
111b
pins
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0x0040 (note 2)
0x0040 (note 2)
0x03C8 (note 2)
0x03C8 (note 2)
0x0040 (note 2)
0x0040 (note 2)
Uses SIOC
(note 1)
Value
page 49
Selection of these preset modes is made
Linear (00b)
Linear (00b)
Linear (01b)
Linear (00b)
Codec Type
Alaw (11b)
law (10b)
(note 3)
CC
. For the A/D-D/A’s shown in Table
Configuration Words
Sent to A/D-D/A Chip
None sent (note 4)
None sent (note 4)
0x4020, 0x800F, 0xD000, 0x1EC0
(note 5)
0x4020, 0x800F, 0xD000, 0x1EA0
(note 5)
None sent (note 4)
None sent (note 4)
When using this