÷M
CLKOUT
CDIV_CLKIN
MCLK
BCLK
DIN
GPIO
MISO
DOUT
PLL_CLK
DAC_CLK
ADC_CLK
DAC_MOD_CLK
DIG_MIC_CLK
M = 1,2,...,127,128
Clock Generation and PLL
In the mode when TLV320DAC3203 is configured to drive the BCLK pin (Page 0, Register 27, D3=’1’) it
can be driven as divided value of BDIV_CLKIN. The division value can be programmed in Page 0,
Register 30, D(6:0) from 1 to 128. The BDIV_CLKIN can itself be configured to be one of DAC_CLK,
DAC_MOD_CLK, ADC_CLK or DIG_MIC_CLK by configuring the BDIV_CLKIN mux in Page 0, Register
29, D(1:0). Additionally a general purpose clock can be driven out on either GPIO, DOUT or MISO pin.
This clock can be a divided down version of CDIV_CLKIN. The value of this clock divider can be
programmed from 1 to 128 by writing to Page 0, Register 26, D(6:0). The CDIV_CLKIN can itself be
programmed as one of the clocks among the list shown in
. This can be controlled by
programming the mux in Page 0, Register 25, D(2:0).
Figure 2-47. General Purpose Clock Output Options
Table 2-21. Maximum TLV320DAC3203 Clock Frequencies
DVdd
≥
1.26V
DVdd
≥
1.65V
CODEC_CLKIN
50MHz
137MHz when NDAC is even, NADC is even
112MHz when NDAC is even, NADC is odd
110MHz when NDAC is odd, NADC is even
110MHz when NDAC is odd, NADC is odd
ADC_CLK
25MHz
55.296MHz
DIG_MIC_CLK
6.758MHz
6.758MHz
ADC_FS
0.192MHz
0.192MHz
DAC_CLK
25MHz
55.296MHz
DAC_MOD_CLK
6.758MHz
6.758MHz
4.2MHz when Class-D Mode Headphone
is used
DAC_FS
0.192MHz
0.192MHz
BDIV_CLKIN
25MHz
55.296MHz
CDIV_CLKIN
50MHz
112MHz when M is odd
137MHz when M is even
64
TLV320DAC3203 Application
SLAU434 – May 2012
Copyright © 2012, Texas Instruments Incorporated