AMBE-2000 Digital Voice Systems, Inc., AMBE-2000 Datasheet - Page 50

• Manufacturer Part Number: AMBE-2000
• Description: 2.0 - 9.6 KBPS Single ic For Toll-quality, Low Data Rate, Real Time Speech Compression
• Manufacturer: Digital Voice Systems, Inc.

Initialization Procedure:
The control registers in the TLV320AIC10 codec must be initialized for proper operation. The recommended
procedure is to initialize the TLV320AIC10 by writing data to its 4 control registers through the DCSI port, while
the AMBE-2000™ is held in reset. The timing for the DCSI port is shown in Figure 2.
Note that the Device Address (D14-D12) is normally set to 0 unless multiple codec devices are used in cascade. Be
sure that the stop bit is at least 2 clock pulses long between data words as shown in the timing diagram. Shift the
control words into the device 1 bit at a time at the rate of SCLK.
Various configuration data can be used to control the operation of the TLV320AIC10 codec (see the data sheet for
more information), however for reference the AMBE-2000™ has been tested with the TLV320AIC10 configured
using the register values shown in Table 1. Once the TLV320AIC10 is configured, the AMBE-2000™ should be
taken out of reset to begin communication with the codec.
The logic connected to the DCSI port does not have to be disabled. The user can make adjustments to the
configuration as needed (for example ADC and DAC gain). A reset to the TLV320AIC10 codec will reset all of the
internal registers. As a result, the TLV320AIC10 must be reconfigured following a reset.
Figure 2: TLV320AIC10 configuration timing via DCSI port
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