cs4271 Cirrus Logic, Inc., cs4271 Datasheet - Page 38

• Manufacturer Part Number: cs4271
• Description: 24-bit, 192 Khz Stereo Audio Codec
• Manufacturer: Cirrus Logic, Inc.

8.
** All registers are read/write in I²C mode and write only in SPI mode, unless otherwise noted**
8.1
8.1.1
8.1.2
8.1.3
8.1.4
38
DAC_DIF2 DAC_DIF1 DAC_DIF0
M1
REGISTER DESCRIPTION
7
0
0
0
0
1
1
1
1
Mode Control 1 - Address 01h
Function:
Function:
Function:
Function:
Functional Mode (Bits 7:6)
Ratio Select (Bits 5:4)
Master / Slave Mode (Bit 3)
DAC Digital Interface Format (Bits 2:0)
Selects the required range of input sample rates.
These bits are used to select the clocking ratios in Control Port Mode. Please refer to Table 8, “Clock
Ratios - Control Port Mode With External Crystal,” on page 28 or Table 9, “Clock Ratios - Control Port
Mode Without External Crystal,” on page 29 for information on which of these bits to set to obtain spe-
cific clock ratios.
This bit selects either master or slave operation. Setting this bit will select master mode, while clearing
this bit will select slave mode.
The required relationship between LRCK, SCLK and SDIN for the DAC is defined by the DAC Digital
Interface Format and the options are detailed in Table 12 and Figures 3-5.
M1
0
0
1
1
M0
0
0
1
1
0
0
1
1
6
M0
0
1
0
1
Ratio1
0
1
0
1
0
1
0
1
5
Table 12. DAC Digital Interface Formats
Table 11. Functional Mode Selection
Single-Speed Mode: 4 to 50 kHz sample rates (default)
Single-Speed Mode: 4 to 50 kHz sample rates
Double-Speed Mode: 50 to 100 kHz sample rates
Quad-Speed Mode: 100 to 200 kHz sample rates
Left Justified, up to 24-bit data (default)
Ratio0
Right Justified, 16-bit Data
Right Justified, 24-bit Data
Right Justified, 20-bit Data
Right Justified, 18-bit Data
4
I
2
S, up to 24-bit data
Description
Reserved
Reserved
M/S
3
Mode
DAC_DIF2
2
Format
DAC_DIF1
0
1
2
3
4
5
1
CS4271
DAC_DIF0
Figure
DS592F1
3
4
5
5
5
5
0