AK4564 Datasheet, PDF (15/48 Pages) Asahi Kasei Microsystems – 16BIT CODEC WITH BUILT-IN ALC AND MIC/HP/SPK-AMP

ASAHI KASEI
[AK4564]
n Audio Serial Interface Format
The SDTI, SDTO, BCLK and LRCK pins are connected to an external controller. The audio data format has four modes,
MSB-first and 2’s compliment. The data format is set by the DIF1-0 bits. SDTI is latched by “↑” of BCLK. SDTO is
latched by “↓”.
When DIF1= “0” and DIF0=”1”, only BCLK=64fs is acceptable.
No. DIF1 bit DIF0 bit
0
0
0
1
0
1
2
1
0
3
1
1
SDTO(ADC)
SDTI(DAC)
MSB justified
LSB justified
LSB justified
LSB justified
MSB justified
I²S compatible
MSB justified
I²S compatible
Table 1. Audio Data Format
BCLK
≥ 32fs
= 64fs
≥ 32fs
≥ 32fs
Figure
Figure 8
Figure 9
Figure 10
Figure 11
RESET
LRCK
01
BCLK(32fs)
23
89
10 11 12 13 14 15 0 1
23
89
10 11 12 13 14 15 0 1
SDTO(o)
SDTI(i)
15 14 13 8 7 6 5 4 3 2 1 0 15 14 13 8 7 6 5 4 3 2 1 0 15
0 1 23
BCLK(64fs)
14 15 16 17 18
31 0 1 2 3
14 15 16 17 18
31 0 1
SDTO(o)
15 14 13 13 2 1 0
15 14 13 1 2 1 0
15
SDTI(i)
Don’t Care
15 14
10
Don’t Care
15 14
15:MSB, 0:LSB
Lch Data
Rch Data
Figure 8. Audio Data Timing (No.0)
10
LRCK
012
BCLK(64fs)
15 16 17 18 19 20
31 0 1 2
15 16 17 18 19 20
31 0 1
SDTO(o)
15
15 14 13 12 4 1 0
15
15 14 13 12
1 0 15
SDTI(i)
Don’t Care
15:MSB, 0:LSB
15 14 13 12
Lch Data
10
Don’t Care
15 14 13 12
Rch Data
10
Figure 9. Audio Data Timing (No.1)
MS0140-E-01
- 15 -
2002/07