AMBE-1000 Digital Voice Systems, Inc., AMBE-1000 Datasheet - Page 42

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

4.1.14.5
0x13EC
Header
The AMBE-1000 is not recommended for new designs.
0x03
ID
Please refer to the AMBE-2000/2020 product line.
9:8
Bit
15
12
11
Control_0 Control_1 Control_2 Control_3
Framed Input : ID = 0x04 : Low Power Mode Command Frame Format
Table 4-Q ID = 0x03, Control_2 Field Values
The Control_3 field, in conjunction with the Optional Configuration Data, can be used to
send control words to a programmable A/D-D/A chip such as the Lucent CSP1027. The
AMBE-1000™ has two hardware configurations which automatically send control words
to the CSP1027 (see Section 5.3), but in the case where the user wants to modify
these control words or send control words to a different A/D-D/A altogether, this is how
it is done.
0x0001-(4 control words) = 0xFFFD. Then that number of 16 bit words will be send
from the Optional Configuration Data area to the A/D-D/A being programmed.
Table 5-A gives the appropriate information to fill in for Control_1 and Control_2 (Codec
Type) if the user does not want to alter the preconfigured hardware settings.
example frame below shows the values one would use to Enable VAD, Echo
Cancellation, with the Lucent CSP1027 AUX IN port (Codec type = 00b). Note that this
particular configuration can be achieved using solely the hardware settings, but is used
in this example purely as a demonstration. In this example the first four 16 bit words
in the Optional Configuration Data field would be sent to the A/D-D/A chip, in this case
the CSP1027.
Table 4-R Example Control Frame with ID=0x03
0x00
The AMBE-1000 can be placed into Low Power modes through either hardware settings
or the Command Frame software interface.
enabled via the Command Frame interface are Standard Sleep and Deep Sleep. See
Section 6.6 for full description of power usage during these modes. When in Standard
Sleep mode, three clock cycles of CLK_I after receiving a Wake-up Command Frame
(ID=0xFE), the AMBE-1000™ returns to normal operation. The only way to return to
normal operation from Deep Sleep is to perform a chip reset via the RESETN (pin 39)
signal.
Unframed Sync
Echo Canceller
VAD Enable
Codec Type
0x03C8 0x1800 0xFFFD 0x4020 0x800F 0xD000 0x1EA0 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000 0x0000
Enable
Field
The AMBE-1000 is not recommended for new designs.
Set Control_3 equal to 0x0001-(number of control words), for example
Please refer to the AMBE-2000/2020 product line.
Value
00
01
10
11
0
1
0
1
0
1
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Description
This field must be 1 when operating in Unframed mode. Otherwise
it should be 0.
Disable Voice Activation Detection
Enable Voice Activation Detection
Disable Echo Canceller
Enable Echo Canceller
16 bit Linear A/D-D/A
TI Codec mode, 16 bit Linear A/D-D/A, with 2 LSB’s forced to 0
8 bit law A/D-D/A
8 bit Alaw A/D-D/A
page 42
Optional Configuration Data, number of words based on 1 – Control_3
The two sleep modes which can be
The