AK7754 Datasheet, PDF (8/26 Pages) Asahi Kasei Microsystems – Audio DSP with Stereo CODEC + MIC/HP-AMP

[AK7754]
No.
Name
I/O
Function
39 VSS4
- Ground Pin 0V
Analog common voltage
40 VCOM
O Connect 0.1μF and 2.2μF capacitors in parallel to VSS4. Never to use for
an external circuit. Outputs “L” during initial reset
41 MPRF
O
Ripple Filter Pin for Microphone Power Supply
Connect a 1uF capacitor between this pin and VSS4.
42 MPWR
O
Power Supply Pin for Microphone
Outputs “Hi-Z” during initial reset
43 ^IN1R
IN2P
I Rch Single-end Input Pin1
I MIC Differential Non-Inverted Input Pin2
(MDIFR bit = “0”)
(MDIFR bit = “1”)
44
IN1L
IN1P
I Lch Single-end Input Pin1
I MIC Differential Non-inverted Input Pin1
(MDIFL bit = “0”)
(MDIFL bit = “1”)
45
IN2R
IN2N
I Rch Single-end Input Pin2
I MIC Differential Inverted Input Pin2
(MDIFR bit = “0”)
(MDIFR bit = “1”)
46 ^IN2L
IN1N
I Lch Single-end Input Pin2
I MIC Differential Inverted Input Pin1
(MDIFL bit = “0”)
(MDIFL bit = “1”)
47 ^IN3R
DMDAT
I Rch Single-end Input Pin3
I Digital Microphone Data Input Pin
(DMIC bit = “0”)
(DMIC bit = “1”)
48 ^IN3L
DMCLK
I Lch Single-end Input Pin3
O Digital Microphone Clock pin
(DMIC bit = “0”)
(DMIC bit = “1”)
Note: Do not leave digital input pins open.
Classification
Analog
Power Supply
Analog Output
Analog Output
Analog Output
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Digital Microphone
Analog Input
Digital Microphone
■ Handling of Unused Pin
The following table illustrates recommended states for open pins:
Classification
Analog
Digital
Pin Name
IN1L/IN1P,IN1R/IN2P,IN2L/IN1N,IN2R/IN2N,IN3L,IN3R
CLKO, BICKO, LRCKO, SDOUT1-2, SDOUTM, STO,
SOUTM/RDY,XTO
SDIN1, SDIN2, BICK1, BICK2, LRCK1, LRCK2, XTI
Setting
Leave Open
Leave Open
Connect to VSS1
MS1138-E-01-PB
8
2012/03