AK4641 Datasheet, PDF (21/51 Pages) Asahi Kasei Microsystems – 16 BIT CODEC WITH BLUETOOTH INTERFACE

ASAHI KASEI
[AK4641]
(3) MSB justified
BSYNC
BBICK
(32Bfs)
BSDTO(o)
0123
15 14 13
9 10 11 12 13 14 15 0 1 2 3
76543210
BSDTI(i)
15 14 13
BBICK
(64Bfs)
BSDTO(o)
0123
15 14 13
7 6 5 4 3 2 1 0 _{Don't Care}
15 16 17 18
31 0 1 2 3
10
BSDTI(i)
15 14 13
10
15:MSB, 0:LSB
Don't Care
9 10 11 12 13 14 15 0 1
15
Don't Care
15 16 17 18
15
31 0 1
15
Don't Care
15
Figure 19. Timing of MSB justified
(4) I²S
BSYNC
BBICK
(32Bfs)
BSDTO(o)
0123
15 14
9 10 11 12 13 14 15 0 1 2 3
876543210
BSDTI(i)
15 14
BBICK
(64Bfs)
BSDTO(o)
0123
15 14
876543210
15 16 17 18
31 0 1 2 3
210
BSDTI(i)
15 14
210
15:MSB, 0:LSB
Don't Care
9 10 11 12 13 14 15 0 1
Don't Care
15 16 17 18
31 0 1
Don't Care
Figure 20. Timing of I²S
„ Digital High Pass Filter
The ADC of Stereo CODEC has a digital high pass filter for DC offset cancellation. The cut-off frequency of the HPF is
3.4Hz (@fs=44.1kHz) and scales with sampling rate (fs).
The ADC of Mono CODEC also has a digital high pass filter for DC offset cancellation. The cut-off frequency of the HPF
is 0.62Hz (@Bfs=8kHz) and scales with sampling rate (Bfs).
MS0301-E-00
- 21 -
2004/05