ADAU1701JSTZ Analog Devices Inc, ADAU1701JSTZ Datasheet - Page 42

• Manufacturer Part Number: ADAU1701JSTZ
• Description: IC AUDIO PROC 2ADC/4DAC 48-LQFP
• Manufacturer: Analog Devices Inc
• Series: SigmaDSP®r
• Type: Audio Processorr

Specifications of ADAU1701JSTZ

• Design Resources: Analog Audio Input, Class-D Output with ADAU1701, SSM2306, and ADP3336 (CN0162)
• Applications: Automotive, Monitors, MP3
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Audio Control Type: Digital
• Control Interface: I2C, Serial
• Supply Voltage Range: 1.8V, 3.3V
• Operating Temperature Range: 0°C To +70°C
• Audio Ic Case Style: LQFP
• No. Of Pins: 48
• Svhc: No SVHC
• Control / Process Application: MP3 Player Speaker Docks, Automotive Head Units, Studio Monitors
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: EVAL-ADAU1701MINIZ - BOARD EVAL SIGMADSP AUD ADAU1701EVAL-ADAU1701EBZ - BOARD EVAL FOR ADAU1701
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

ADAU1701
2079 (0x081F)—SERIAL INPUT CONTROL REGISTER
Table 50. Serial Input Control Register Bit Map
D7
0
Table 51.
Bit Name
ILP
IBP
M[2:0]
D6
0
Description
INPUT_LRCLK Polarity. When this bit is set to 0, the left-channel data on the SDATA_INx pins is clocked when
INPUT_LRCLK is low and the right-channel data is clocked when INPUT_LRCLK is high. When this bit is set to 1,
the clocking of these channels is reversed. In TDM mode when this bit is set to 0, data is clocked in, starting with
the next appropriate BCLK edge (set in Bit 3 of this register) after a falling edge on the INPUT_LRCLK pin. When
this bit is set to 1 and the device is running in TDM mode, the input data is valid on the BCLK edge after a rising
edge on the word clock (INPUT_LRCLK). INPUT_LRCLK can also operate with a pulse input, rather than a clock.
In this case, the first edge of the pulse is used by the ADAU1701 to start the data frame. When this polarity bit is
set to 0, a low pulse should be used; when the bit it set to 1, a high pulse should be used.
INPUT_BCLK Polarity. This bit controls on which edge of the bit clock the input data changes and on which edge
it is clocked. Data changes on the falling edge of INPUT_BCLK when this bit is set to 0 and on the rising edge when
this bit is set at 1.
Serial Input Mode. These two bits control the data format that the input port expects to receive. Bit 3 and Bit 4
of this control register override the settings of Bits[2:0]; therefore, all four bits must be changed together for
proper operation in some modes. The clock diagrams for these modes are shown in Figure 32, Figure 33, and
Figure 34. Note that for left-justified and right-justified modes, the LRCLK polarity is high and then low, which is
the opposite of the default setting for ILP.
When these bits are set to accept a TDM input, the ADAU1701 data starts after the edge defined by ILP. The
ADAU1701 TDM data stream should be input on Pin SDATA_IN0. Figure 35 shows a TDM stream with a high-to-
low triggered LRCLK and data changing on the falling edge of the BCLK. The ADAU1701 expects the MSB of
each data slot to be delayed by one BCLK from the beginning of the slot, as it would in stereo I
mode, Channel 0 to Channel 3 are in the first half of the frame, and Channel 4 to Channel 7 are in the second
half. Figure 36 shows an example of a TDM stream running with a pulse word clock, which is used to interface to
ADI codecs in auxiliary mode. To work in this mode with either the input or output serial ports, set the
ADAU1701 to begin the frame on the rising edge of LRCLK, to change data on the falling edge of BCLK, and to
delay the MSB position from the start of the word clock by one BCLK.
M[2:0]
000
001
010
011
100
101
110
111
D5
0
Setting
I
Left-justified
TDM
Right-justified, 24 bits
Right-justified, 20 bits
Right-justified, 18 bits
Right- justified, 16 bits
Reserved
2
S
D4
ILP
Rev. A | Page 42 of 56
D3
IBP
D2
M2
D1
M1
D0
M0
2
S format. In TDM
0x00
Default