Texas Instruments TLV320AIC12KEVMB-K Benutzerhandbuch
6.8.3
Control Register 3 Tab
6.8.4
Control Register 4 Tab
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Kit Operation
Figure 8. Control Register 2 Tab
The Control Register 3 Tab (
) allows the user to set the DAC Oversampling Rate (OSR), set
the Asynchronous Sampling Rate Factor and power down the ADC or DAC with the Power Down
Controls. The indicator below each power down switch will light when on only if the register data sent by
pressing the Program Device button is acknowledged. The USB-MODEVM Audio Interface
Configuration currently allows a fixed sampling rate and a single codec. For an OSR=256 the value of M,
set in register 4, must be a multiple of 2. Similarly, for an OSR=512 the value of M must be a multiple of 4.
Controls. The indicator below each power down switch will light when on only if the register data sent by
pressing the Program Device button is acknowledged. The USB-MODEVM Audio Interface
Configuration currently allows a fixed sampling rate and a single codec. For an OSR=256 the value of M,
set in register 4, must be a multiple of 2. Similarly, for an OSR=512 the value of M must be a multiple of 4.
Figure 9. Control Register 3 Tab
The Control Register 4 Tab (
) provides controls for P, N and M. Furthermore, an FS calculator
is provided for convenience. The calculator derives FS from the MCLK frequency entered by the user or
loaded by a preset by using the equation: FS=MCLK
loaded by a preset by using the equation: FS=MCLK
÷
(16
×
P
×
M
×
N). The PLL Method switch illustrates
that for coarse sampling, P must be equal to 8. Please note that the FS calculator and the PLL Method
SLAU229B – October 2007 – Revised August 2008
TLV320AIC12KEVMB-K and TLV320AIC14KEVMB-K User's Guide
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