AK4637EN Datasheet, PDF (9/96 Pages) Asahi Kasei Microsystems – 24bit Mono CODEC with MIC/SPK-AMP

[AK4637]
■ PIN/FUNCTION
No. Pin Name I/O Function
AIN
I
Analog Input Pin
(MDIF bit = “0”: Single-ended Input, DMIC bit = “0”: default)
1 _IN+
I
Positive Analog Input Pin
(MDIF bit = “1”: Full-differential Input, DMIC bit = “0”)
DMDAT I Digital Microphone Data Input Pin (DMIC bit = “1”)
2 PDN
I
Reset & Power-down Pin
“L”: Reset & Power-down, “H”: Normal Operation
3 SCL
I Control Data Clock Pin
4 SDA
I/O Control Data Input/Output Pin
5 SDTI
I Audio Serial Data Input Pin
6 SDTO
O Audio Serial Data Output Pin
7 FCK
I/O Frame Clock Pin
8 BICK
I/O Audio Serial Data Clock Pin
9 MCKI
I External Master Clock Input Pin
10 TVDD
- Digital I/O Power Supply Pin, 1.6 or (DVDD-0.2) ~ 3.6V
11 DVDD
- Digital Power Supply Pin, 1.6 ~ 1.98V
12 VSS2
- Ground 2 Pin
SPN
O Speaker-Amp Negative Output Pin
(LOSEL bit = “0”: default)
13 _NC
O
No Connect Pin
This pin should be open.
(LOSEL bit = “1”)
14
SPP
AOUT
O Speaker-Amp Positive Output Pin
O Line Output Pin
(LOSEL bit = “0”: default)
(LOSEL bit = “1”)
15 AVDD
- Analog Power Supply Pin, 2.8 ~ 5.5V
16 VSS1
- Ground 1 Pin
Common Voltage Output Pin
17 VCOM
O
Bias voltage of ADC inputs and DAC outputs.
This pin must be connected to VSS1 with 2.2μF±10% or 4.7μF±10%
capacitor in series.
18 REGFIL
O
LDO Voltage Output pin for Analog Block (typ 2.3V)
This pin must be connected to VSS1 with 2.2μF±10% capacitor in series.
19 MPWR
O MIC Power Supply Pin
BEEP
I
Beep Signal Input Pin
(MDIF bit=“0”: Single-ended Input, DMIC bit=“0”: default)
20 _IN-
I
Negative Analog Input Pin
(MDIF bit = “1”: Full-differential Input, DMIC bit=“0”)
DMCLK O Digital Microphone Clock pin (DMIC bit = “1”)
Note 1. All input pins except analog input pins (AIN/IN+, IN-/BEEP) must not be allowed to float.
■ Handling of Unused Pin
Unused I/O pins must be processed appropriately as below.
Classification Pin Name
Analog
AIN/IN+/DMDAT, BEEP/IN-/DMCLK, MPWR,
SPN, SPP/AOUT
Digital
MCKI, SDTI
SDTO
Setting
Open
Connect to VSS2
Open
015010680-E-00
-9-
2015/09