ASAHI KASEI
[AK4556]
PIN/FUNCTION
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
Pin Name
RIN
LIN
VSS
VA
VD
DEM0
DEM1
SDTO
CKS0
CSK1
CSK2
CSK3
SDTI
I/O
I
I
-
-
-
I
I
O
I
I
I
I
I
Function
Rch Analog Input Pin
Lch Analog Input Pin
Ground Pin
Analog Power Supply Pin
Digital Power Supply Pin
De-emphasis Control Pin
De-emphasis Control Pin
Audio Serial Data Output Pin
When PDN pin is “L”, SDTO pin outputs “L”.
Mode Setting Pin #0
Mode Setting Pin #1
Mode Setting Pin #2
Mode Setting Pin #3
Audio Serial Data Input Pin
Input/Output Channel Clock Pin
14
LRCK
I/O
When PDN pin is “L”, LRCK pin outputs “L” in master mode.
15
MCLK
I
Master Clock Input Pin
Audio Serial Data Clock Pin
16
BCLK
I/O
When PDN pin is “L”, BCLK pin outputs “L” in master mode.
Power-Down & Reset Mode Pin
17
PDN
I
“L”: Power-down and Reset, “H”: Normal operation
The AK4556 should be reset once by bringing PDN pin = “L”.
18
VCOM
O
Common Voltage Output Pin, 0.5 x VA
Lch Analog Output Pin
19
LOUT
O
When PDN pin is “L”, LOUT pin becomes Hi-Z.
Rch Analog Output Pin
20
ROUT
O
When PDN pin is “L”, ROUT pin becomes Hi-Z.
Note: Do not allow digital input pins except analog input pins (LIN and RIN) to float.
Handling of Unused Pin
The unused I/O pin should be processed appropriately as below.
Classification
Analog Input
Analog Output
Pin Name
LIN, RIN
LOUT, ROUT
Setting
These pins should be open.
These pins should be open.
MS0559-E-00
-5-
2006/11
AKM [ ASAHI KASEI MICROSYSTEMS ]
