AK4120 Datasheet, PDF (18/30 Pages) Asahi Kasei Microsystems – Sample Rate Converter with Mixer and Volume

ASAHI KASEI
[AK4120]
n Audio Serial Interface Format
Four serial data modes can be selected by the I2S pin and D5-D0 bits in register 00H as shown in Table 6∼8. In all
modes the serial audio data is MSB-first, 2’s compliment format. The SDTO is clocked out on the falling edge of
BICKO and the SDTI1 and SDTI2 are latched on the rising edge of BICKI1 and BICKI2.
I2S pin
L
L
L
L
H
DIFI11
0
0
1
1
X
DIFI10
SDTI1
0 20bit, MSB justified
1
20bit, I²S
0 20bit, LSB justified
1 16bit, LSB justified
X
20bit, I²S
Table 6. Audio data formats for Input#1 port
LRCK
H/L
L/H
H/L
H/L
L/H
Default
I2S pin
L
L
L
L
H
DIFI21
0
0
1
1
X
DIFI20
SDTI2
0 20bit, MSB justified
1
20bit, I²S
0 20bit, LSB justified
1 16bit, LSB justified
X
20bit, I²S
Table 7. Audio data formats for Input#2 port
LRCK
H/L
L/H
H/L
H/L
L/H
Default
I2S pin
L
L
L
L
H
DIFO1
0
0
1
1
X
DIFO0
SDTO
0 20bit, MSB justified
1
20bit, I²S
0 20bit, LSB justified
1 16bit, LSB justified
X
20bit, I²S
Table 8. Audio data formats for Output port
LRCK
H/L
L/H
H/L
H/L
L/H
Default
Note: When the Audio Serial Interface Mode is changed, the AK4120 should be powered down using the PW bit.
(“PW”=0)
MS0134-E-00
- 18 -
2002/1