6.8.5
Control Register 5 Tab
6.8.6
Control Register 6 Tab
Kit Operation
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are merely for illustration; what is actually written to registers 4A and 4B are the values of
P
,
M
and
N
only. The
USB-MODEVM Audio Interface Configuration
is set up for an
MCLK=11.2896 MHz
, so
P
,
M
and
N
must satisfy the
FS
equation and the SCLK equation in Turbo Mode for that configuration. If using
the
External Audio Interface Configuration
, the divider values can be set to anything specified in the
datasheet.
Figure 10. Control Register 4 Tab
The
Control Register 5 Tab
(
) has several gain controls. The
ADC PGA
and
DAC PGA
gain
knobs range from -42dB to 20dB and each have a
MUTE
button. The gain knobs and the respective
MUTE
buttons write to register 5A for the ADC PGA and to register 5B for the DAC PGA. Sliders are
provided for the
Input Buffer Gain
(0dB to 24dB) and the
Digital Sidetone Gain
(-21dB to -3dB w/
MUT
E)
and they both share register 5C. For convenience, the corresponding register for each control is provided
to the right of the tab. An 'x' denotes the bits modified by the corresponding control.
Figure 11. Control Register 5 Tab
The
Control Register 6 Tab
(
) provides controls to select the analog input and to configure the
analog outputs. Note that OUTP2/P3 are only available on the TLV320AIC12/12K. The
TLV320AIC12KEVM/14KEVM provides a 1/8" audio jack (J8) to connect a microphone, an on-board
electret microphone (MK1) and another 1/8" audio jack (J11) to connect a stereo headset. There are four
options for the
Analog Input Select
control:
a. INP/M1 - selects input 1 as the input source (connected to screw terminal J10). To use this mode,
jumper W11 must be installed on pins 2-3.
b. MICIN self-biased to 1.35V (single-ended) - In this mode, the device internally self-biases the input to
1.35V. To use this mode, jumper W11 must be installed on pins 2-3. Jumper W12 must be installed if
using the on-board electret microphone (MK1), otherwise a microphone can be connected to J8.
18
TLV320AIC12KEVM-K and TLV320AIC14KEVM-K User's Guide
SLAU229A – October 2007 – Revised June 2008
