AK7752 Datasheet, PDF (7/23 Pages) Asahi Kasei Microsystems – Audio/Hands Free DSP with Stereo CODEC

[AK7752]
No. Pin Name I/O
Function
Classification
50 CKM[1] I Clock Mode Select Pin 1
Mode Select
51 CKM[0] I Clock Mode Select Pin 0
52 TESTI1
I
TEST pin (Internal pull-down)
Connect to DVSS.
TEST
53
LFLT
O
PLL RC component connect pin
Connect a series resistor and capacitor pair to this pin.
Analog Output
54 AVSS - Analog ground Pin 0V (Silicon substrate potential)
Analog
55 AVDD - Power Supply Pin for Analog Section (3.3V typical)
Power Supply
56 ANE_IN
I
ADC Analog Input Pin (ANE_IN)
Normally connected to the microphone amplifier.
Analog Input
57 ALINE_IN
I
ADC Analog Input Pin (ALINE_IN)
Normally the receiving analog phone voice signal is input.
58 AVDD - Analog Power Supply Pin (3.3V typical)
Analog
Power Supply
Analog Reference Voltage Input Pin
59 VREFH I Connect this pin to AVDD. Connect capacitors of 0.1 uF and 10 uF between this Analog Input
pin and AVSS.
Analog Common Voltage Output pin
60 VCOM O Connect capacitors of 0.1 uF and 10 uF between this pin and AVSS. No external Analog Output
circuits should be connected to this pin.
61 VREFL
I
Analog Reference Voltage Input pin
Connect this pin to AVSS.
Analog Input
62 AVSS - Analog ground Pin 0V (Silicon substrate potential)
Analog
Power Supply
63
ALINE_OUT
O
DAC Analog Output Pin (ALINE_OUT)
Normally the sending analog phone voice signal is output.
64
ANE_OUT
O
DAC Analog Output Pin (ANE_OUT)
Normally connected to the speaker amplifier.
Analog Output
Note 1. Do NOT leave digital input pins open except for pins that indicate “Internal pull down”, BITCLK_I and
SYNC_I at master mode. (Internal pull down pins except TEST1 and TEST2 pins leave them open or connect
them to DVSS. Connect TEST1 and TEST2 pins to DVSS).
Note 2. When analog input pins (ALINE_IN, ANE_IN) are not used, leave them open.
Note 3. Connect I2CSEL to “L” (DVSS) or “H” (DVDD).
Relationship between I2CSEL and SDA
uP I/F
I2CSEL
Normal Serial
L
Interface
L
I²C Bus Mode
H
H
INIT_RESET_N
L
H
L
H
SDA
L
L
“Hi-Z” → pull-up
function
MS0578-E-01-PB
-7-
2007/09