ASAHI KASEI
[AK4112A]
n Sampling Frequency and Pre-emphasis Detect
The AK4112A outputs the encoded information of sampling frequency and pre-emphasis in channel status to FS0, FS1
and PEM bits in control register. These information are output from channel 1 at default. It can be switched to channel 2
by CS12 bit in control register.
Byte 3
FS1
FS0
fs
Bits 0-3
0000
0
0
1
1
0
1
0
1
44.1kHz
Reserved
48kHz
all others
0100
32kHz
1100
Table 3. fs information in Consumer Mode
Byte 0
FS1
FS0
fs
Bits 6-7
10
0
0
1
1
0
1
0
1
44.1kHz
Reserved
48kHz
00
01
32kHz
11
Table 4. fs information in Profession Mode
Byte 0
PEM
Pre-emphasis
Bits 3-5
¹ 0X100
0X100
0
1
OFF
ON
Table 5. PEM in Consumer Mode
Byte 0
PEM
Pre-emphasis
Bits 2-4
¹110
110
0
1
OFF
ON
Table 6. PEM in professional Mode
MS0020-E-00
2000/3
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AKM [ ASAHI KASEI MICROSYSTEMS ]
