ASAHI KASEI
[AK4367]
MS0247-E-01
2004/11
- 4 -
PIN/FUNCTION
No.
Pin Name
I/O
Function
SDA
I/O
Control Data Input/Output Pin (I2C pin = “H”)
1
CDTI
I
Control Data Input Pin (I2C pin = “L”)
SCL
I
Control Data Clock Pin (I2C pin = “H”)
2
CCLK
I
Control Data Clock Pin (I2C pin = “L”)
CAD0
I
Chip Address 0 Select Pin (I2C pin = “H”)
3
CSN
I
Control Data Chip Select Pin (I2C pin = “L”)
4
SDATA
I
Audio Serial Data Input Pin
5
LRCK
I
L/R Clock Pin
This clock determines which audio channel is currently being input on SDATA pin.
6
BICK
I
Serial Bit Clock Pin
This clock is used to latch audio data.
7
MCLK
I
Master Clock Input Pin
8
PDN
I
Power-down & Reset Pin
When at “L”, the AK4367 is in power-down mode and is held in reset.
The AK4367 should always be reset upon power-up.
9
I2C
I
Control Mode Select Pin (Internal Pull-down Pin)
“H”: I
2C Bus, “L”: 3-wire Serial
10
MOUT
O
Mono Analog Output Pin
11
VCOM
O
Common Voltage Output Pin
Normally connected to VSS pin with 0.1
F ceramic capacitor in parallel with a 2.2F
electrolytic capacitor.
12
MUTET
O
Mute Time Constant Control Pin
Connected to VSS pin with a capacitor for mute time constant.
13
VDD
-
Power Supply Pin
14
VSS
-
Ground Pin
15
HVDD
-
Power Supply Pin for Headphone Amp
16
HPR
O
Rch Headphone Amp Output Pin
17
HPL
O
Lch Headphone Amp Output Pin
18
MIN
I
Mono Analog Input Pin
19
RIN
I
Rch Analog Input Pin
20
LIN
I
Lch Analog Input Pin
Note: All digital input pins except analog input pins (MIN, RIN and LIN) and internal pull-down pin must not be left
floating.
Handling of Unused Pin
The unused I/O pins should be processed appropriately as below.
Classification
Pin Name
Setting
Analog
MOUT, MUTET, HPR, HPL, MIN, RIN, LIN
These pins should be open.
Digital
CAD0
These pins should be connected to VSS.