AK4366_04 Datasheet, PDF (12/31 Pages) Asahi Kasei Microsystems – Low Power 24-Bit 2ch DAC with HP-AMP

ASAHI KASEI
[AK4366]
„ Serial Data Interface
The AK4366 interfaces with external system via the SDATA, BICK and LRCK pins. In serial mode (P/S pin = “L”), five
data formats are available and are selected by setting DIF2, DIF1 and DIF0 bits (Table 3). In parallel mode (P/S pin =
“H”), two data formats are available and are selected by setting DIF0 pin (Table 3). Mode 0 is compatible with existing
16bit DACs and digital filters. Mode 1 is a 20bit version of Mode 0. Mode 4 is a 24bit version of Mode 0. Mode 2 is
similar to AKM ADCs and many DSP serial ports. Mode 3 is compatible with the I²S serial data protocol. In Modes 2 and
3 with BICK≥48fs, the following formats are also valid: 16-bit data followed by eight zeros (17th to 24th bits) and 20-bit
data followed by four zeros (21st to 24th bits). In all modes, the serial data is MSB first and 2’s complement format.
DIF2 bit
0
0
0
0
1
DIF1 bit
0
0
1
1
0
DIF0 bit
MODE
BICK
0
0: 16bit, LSB justified
32fs ≤ BICK ≤ 64fs
1
1: 20bit, LSB justified
40fs ≤ BICK ≤ 64fs
0
2: 24bit, MSB justified
48fs ≤ BICK ≤ 64fs
1
3: I²S Compatible BICK=32fs or 48fs ≤ BICK ≤ 64fs
0
4: 24bit, LSB justified
48fs ≤ BICK ≤ 64fs
Table 3. Audio Data Format (Serial Mode)
Figure
Figure 9
Figure 10
Figure 11
Figure 12
Figure 10
DIF0 pin
L
H
MODE
BICK
2: 24bit, MSB justified
48fs ≤ BICK ≤ 64fs
3: I²S Compatible BICK=32fs or 48fs ≤ BICK ≤ 64fs
Table 4. Audio Data Format (Parallel Mode)
Figure
Figure 11
Figure 12
LRCK
BICK
(32fs)
SDATA
Mode 0
BICK
15 14
6 5 4 3 2 1 0 15 14
6 5 4 3 2 1 0 15 14
SDATA
Mode 0
Don’t care
15:MSB, 0:LSB
15 14
0 Don’t care
15 14
0
Lch Data
Rch Data
Figure 9. Mode 0 Timing
MS0248-E-01
- 12 -
2004/03