AK7746 Datasheet, PDF (5/62 Pages) Asahi Kasei Microsystems – Audio DSP with 5-channel 24-bit ADC and Input Mux

[ASAHI KASEI]
[AK7746]
(2) Pin function
Pin No
1
2
3
4
5
6
7
8
9
10
11
12
13
Pin name
AINR5
AINL5
AINR6
AINL6
AINR7
AINL7
AINR8
AINL8
BVSS
DVSS
DVDD
CS
RQ
I/O
Function
I ADC1 or ADC2 Rch single ended analog input 5
I ADC1 or ADC2 Lch single ended analog input 5
I ADC1 or ADC2 Rch single ended analog input 6
I ADC1 or ADC2 Lch single ended analog input 6
I ADC1 or ADC2 Rch single ended analog input 7
I ADC1 or ADC2 Lch single ended analog input 7
I ADC1 or ADC2 Rch single ended analog input 8
I ADC1 or ADC2 Lch single ended analog input 8
- Analog ground (Silicon base ground level)
Connect with AVSS pin
- Digital Ground 0.0V
- Digital power supply 3.3V(typ)
Chip select pin for Microcomputer interface. (Internal pull-down)
I Normaly leave OPEN or connect with DVSS.
CS =”H” : SI can not input, SO,RDY,DRDY = Hi-Z.
Write request pin for Microcomputer interface.
I _{RQ =”L” : Microcomputer interface enable.}
Classification
Analog input
Analog Power supply
Digital Power supply
Microcomputer
Interface
For run-time data read out: RQ =”H”.
When Microcomputer interface is not used or during initial reset, leave
RQ =”H”.
Serial data input and serial data output control pin for Microcomputer
14
SI
I interface.
When SI is not used, leave SI=”L”.
15
SCLK
I Serial data clock pin for Microcomputer interface.
When SCLK is not used, leave SCLK=”H”.
16
SO
O Serial data output pin for Microcomputer interface.
CS =”H” : SO = Hi-Z.
17
RDY
O Data write ready output pin for Microcomputer interface.
CS =”H” : RDY = Hi-Z.
18
DRDY
O Output data ready pin for Microcomputer interface.
CS =”H” : DRDY = Hi-Z.
19 _{INIT_RESET} I Reset pin ( for initialization )
Reset
Used for initialization of the AK7746. When changing CKS1 or CKS0 and
changing XTI input frequency, this pin setting is necessary.
20 _{S_RESET} I System Reset pin
21 SDIN4/JX2 I DSP serial data input pin / External condition jump pin
Digital section
(Internal pull-down )
Serial input data /
* Compatible with MSB justified 24 bits / LSB justified 24,20 and 16 bits Conditional input
* It can change its function as a conditional jump pin JX2 by control register
setting (JX2_E).
22 SDIN3/JX1 I DSP serial data input pin / External condition jump pin
Digital section
(Internal pull-down )
Serial input data /
* Compatible with MSB justified 24 bits / LSB justified 24,20 and 16 bits Conditional input
* It can change its function as a conditional jump pin JX1 by control register
setting (JX1_E).
[MS0369-E00]
-5-
2004/12