AK7770EQ Datasheet, PDF (6/22 Pages) Asahi Kasei Microsystems – Audio DSP with Multi-Channel Audio CODEC

[AK7770]
PIN FUNCTION
No. Pin name I/O
Function
Classification
1
FRIR1
I Rch Feedback Resistance Input Pin for ADC1
2
FRIL1
I Lch Feedback Resistance Input Pin for ADC1
3
FROL1
O Lch Feedback Resistance Output Pin for ADC1
At initial reset, this pin goes Hi-Z.
Analog
4
LFLT
O Loop Filter Pin.
Connect a 10nF cap to AVDD. The output is AVDD at initial reset
5
AVDD
- Analog Power Supply Pin 3.3V (typ)
6
VSS1
- Analog Ground Pin 0V (connected to silicon substrate)
Analog power
supply
7
TESTI
I Test Pin (Internal pull-down)
Connect to GND.
8 CKM [0] I Clock Mode Selection Pin
Connect to GND.
9 HMUTEN I Headphone Amplifier Mute Pin
Test
Mode choice
Headphones
10 INITRSTN
11 TEST2
12 DVDD18
13
VSS3
I Reset Pin (for initialization)
Use to initialize the AK7770.
I Test Pin
Connect to GND.
- Digital Power Supply Pin 1.8V(typ)
- Digital Ground Pin 0V
Reset
Test
Digital power
supply
14
DVDD
- Digital Power Supply Pin 3.3V(typ)
15 LRCLKO O Left/right Clock Output Pin
System clock
The output in initial reset is “L”.
16
CLKO
O Clock Output Pin
The output in initial reset is “L”.
17 BITCLKO O Bit Clock Output Pin
The output in initial reset is “L”.
18 SDOUT1 O Serial Data Output 1 Pin
Serial data
The output in initial reset is “L”.
19 SDOUT2 O Serial Data Output 2 Pin
The output in initial reset is “L”.
20 SDOUT3 O Serial Data Output 3 Pin
The output in initial reset is “L”.
21
XTO
O Crystal Oscillator Output Pin
A system clock
Connect a crystal oscillator between the XTI pin and XTO pin. Leave open
when using an external clock source. The output in initial reset is
undetermined.
22
XTI
I Crystal Oscillator Input Pin
Connect a crystal oscillator between the XTI pin and XTO pin. Input an
external clock into the XTI pin when not using a crystal oscillator.
23
DVDD
- Digital Power Supply Pin 3.3V(typ)
Digital power
24
VSS3
- Digital Ground Pin 0V
supply
25 DVDD18 - Digital Power Supply Pin 1.8V(typ)
MS0699-E-01-PB
-6-
2008/06