ak4368 AKM Semiconductor, Inc., ak4368 Datasheet - Page 22

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ak4368

Manufacturer Part Number
ak4368
Description
Dac With Built-in Pll & Hp-amp
Manufacturer
AKM Semiconductor, Inc.
Datasheet
Mode
ASAHI KASEI
The AK4368 interfaces with external systems via the SDATA, BICK and LRCK pins. Five data formats are available,
selected by setting the DIF2, DIF1 and DIF0 bits (Table 11). Mode 0 is compatible with existing 16-bit DACs and digital
filters. Mode 1 is a 20-bit version of Mode 0. Mode 4 is a 24-bit version of Mode 0. Mode 2 is similar to AKM ADCs and
many DSP serial ports. Mode 3 is compatible with the I
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.
When master mode and BICK=32fs(BF bit = “0”), the AK4368 cannot be set to Mode 1 or Mode 2.
MS0529-E-00
0
1
2
3
4
Serial Data Interface
SDATA
LRCK
BICK
SDATA
SDATA
SDATA
LRCK
BICK
(32fs)
BICK
Mode 4
Mode 1
Mode 0
Mode 0
DIF2
0
0
0
0
1
DIF1
Don’t care
19:MSB, 0:LSB
23:MSB, 0:LSB
Don’t care
15
Don’t care
15:MSB, 0:LSB
0
0
1
1
0
14
DIF0
0
1
0
1
0
23
Figure 16. Mode 1, 4 Timing (LRP = BCKP bits = “0”)
6
Figure 15. Mode 0 Timing (LRP = BCKP bits = “0”)
Lch Data
Lch Data
2: 24bit, MSB justified
0: 16bit, LSB justified
1: 20bit, LSB justified
4: 24bit, LSB justified
22
5
3: I
21
2
4
S Compatible
Format
20
Table 11. Audio Data Format
15
3
19
19
14
2
1
2
S serial data protocol. In Modes 2 and 3 with BICK≥48fs, the
0
0
0
0
- 22 -
BICK=32fs or 48fs ≤ BICK ≤ 64fs
Don’t care
Don’t care
Don’t care
15
14
32fs ≤ BICK ≤ 64fs
40fs ≤ BICK ≤ 64fs
48fs ≤ BICK ≤ 64fs
48fs ≤ BICK ≤ 64fs
BICK
23
6
Rch Data
Rch Data
22
5
21
4
20
15
3
19
19
14
2
Figure 15
Figure 16
Figure 17
Figure 18
Figure 16
1
Figure
0
0
0
0
[AK4368EG]
15
2006/07
Default
14

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