AK4122A AKM [Asahi Kasei Microsystems], AK4122A Datasheet - Page 18

• Manufacturer Part Number: AK4122A
• Description: 24-Bit 96kHz SRC with DIR
• Manufacturer: AKM [Asahi Kasei Microsystems]

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When PORT2 and PORT3 are used as output port, the M/S2 pin and M/S3 pin select either master or slave mode for each
port. “H” is for master mode, and “L” is for slave mode. MCLK should be supplied to the port which is in master mode,
and the AK4122A outputs BICK and LRCK. BICK and LRCK should be supplied externally to the port which is in slave
mode, and MCLK is not needed fro this ports. When PORT2 is used as an input port, the M/S2 pin should be set “H” or
“L”.
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The audio interface should be controlled during PWN bit = “0”. When in BYPASS mode, BICK1, BICK2 and BICK are
fixed to 64fs.
(1) PORT1
Four types of data formats are available and are selected by setting the DIF1-0 bits.
is in MSB first, 2’s compliment format. The SDTI is latched on the rising edge of BICK1. PORT1 corresponds to slave
mode only.
Note: The DIF1-0 bits of the PORT1 must not be set “10” (I
MS1076-E-01
Master Mode and Slave Mode
Audio Interface Format
selected as an input port.
Mode
0
1
2
3
M/S3 pin
M/S2 pin
H
H
H
H
L
L
L
L
DIF1
0
0
1
1
BYPS bit
Table 6. Master mode/Slave mode for PORT2
Table 7. Master mode/Slave mode for PORT3
BYPS bit
DIF0
Table 8. Audio Interface Format for PORT1
0
1
0
1
0
1
0
1
0
1
0
1
24bit, I
24bit, MSB justified
16bit, LSB justified
24bit, LSB justified
Input Format
Data I/O
Data I/O
Output
Output
Output
Output
Output
Input
2
I/O
I/O
I/O
S Compatible
- 18 -
Master, Bypass
Master, Bypass
Not Available
Not Available
Slave, Bypass
Master, SRC
Master, SRC
Slave, SRC
Slave, SRC
2
Mode
Mode
S Compatible) when the DIR is
LRCK
H/L
H/L
L/H
H/L
BICK
≥ 32fs
≥ 48fs
≥ 48fs
≥ 48fs
(Table
BICK, LRCK
BICK, LRCK
Output
Output
Input
Input
8) In all modes, the serial data
(default)
[AK4122A]
2010/05