AK4352 Datasheet, PDF (8/13 Pages) Asahi Kasei Microsystems – 2V & LOW POWER MULTI-BIT DAC

ASAHI KASEI
[AK4352]
n Audio Serial Interface Format
The AK4352 interfaces with external system by using SDATA, BICK and LRCK pins. Four types of data format are
available and one of them is selected by setting DIF0 and DIF1. Format 0 is compatible with existing 16bit DACs and
digital filters. Format 1 is an 18bit version of format 0. Format 2 is similar to AKM ADCs and many DSP serial ports.
Format 3 is compatible with the I²S serial data protocol. In format 2 and 3, 16bit data followed by two zeros also could
be input. In all modes, the serial data is MSB first and 2’s complement format.
DIF1
0
0
1
1
DIF0
0
1
0
1
Mode
0: 16bit LSB Justified
1: 18bit LSB Justified
2: 18bit MSB Justified
3: I²S Compatible
BICK
≥32fs
≥36fs
≥36fs
≥32fs or 36fs
Figure
Figure 2
Figure 2
Figure 3
Figure 4
Table 2. Digital Input Formats
LRCK
Lch
Rch
BICK
SDATA
Mode 0
SDATA
Mode 1
Don’t care
15 14
15:MSB, 0:LSB (@16bit Data)
Don’t care
17 16 15 14
17:MSB, 0:LSB (@18bit Data)
0 Don’t care
15 14
0
0 Don’t care
17 16 15 14
0
*Mode 1: BICK needs 36fs or more than 36fs.
Figure 2. Mode 0,1 Timing
LRCK
Lch
Rch
BICK
SDATA
16bit
SDATA
18bit
15 14
17 16
10
Don’t
care
15 14
10
Don’t
care
15 14
3
2
1
0
Don’t
care
17 16
Figure 3. Mode 2 Timing
3 2 1 0 ^{Dcaorne’t}
17 16
* BICK needs 36fs or more than 36fs.
M0040-E-02
-8-
2000/11