AK4950 Datasheet, PDF (90/106 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP & mini DSP

[AK4950]
SYSTEM DESIGN
Figure 65 shows the system connection diagram. An evaluation board (AKD4950) is available for fast evaluation as well
as suggestions for peripheral circuitry.
Power Supply
2.7 ∼ 3.6V
10u
Speaker
Power Supply
1.6 ∼ 3.6V
2.2u 1.0u
Video Out
Video In
0.1u
2.2u
75
25 VSS3
0.1u
26 AVDD
27 VCOM
0.1u
28 VSS1
29 VOUT
30 VSS4
0.1u
2.2u _{31 PVEE}
0.1u _{32 VIN}
AK4950
Top View
0.1u
TVDD 16
BICK 15
LRCK 14
SDTO 13
SDTI 12
CDTIO 11
CCLK 10
CSN 9
DSP
μP
1u 1u
20k
20k
2.2k
2.2k
2.2k
2.2k Analog Ground Digital Ground
Line Out Internal
MIC
External
MIC
Notes:
- VSS1, VSS2, VSS3 and VSS4 of the AK4950 must be distributed separately from the ground of external
controllers.
- All digital input pins must not be allowed to float.
- When the AK4950 is used in master mode, LRCK and BICK pins are floating before M/S bit is changed to “1”.
Therefore, around 100kΩ pull-up resistor must be connected to LRCK and BICK pins of the AK4950.
Figure 65. System Connection Diagram (3-wire Mode, Stereo Lineout PMBP bit = “0”)
MS1320-E-00
- 90 -
2011/10