[AK4112B]

MS0078-E-03

2012/01

- 11 -

Sampling Frequency and Pre-emphasis Detect

The AK4112B 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.

FS1

FS0

fs

Byte 3

Bits 0-3

0

0

44.1kHz

0000

0

1

Reserved

all others

1

0

48kHz

0100

1

1

32kHz

1100

Table 3. fs information in Consumer Mode

FS1

FS0

fs

Byte 0

Bits 6-7

0

0

44.1kHz

10

0

1

Reserved

00

1

0

48kHz

01

1

1

32kHz

11

Table 4. fs information in Profession Mode

PEM

Pre-emphasis

Byte 0

Bits 3-5

0

OFF

≠ 0X100

1

ON

0X100

Table 5. PEM in Consumer Mode

PEM

Pre-emphasis

Byte 0

Bits 2-4

0

OFF

≠110

1

ON

110

Table 6. PEM in professional Mode