ak4115 AKM Semiconductor, Inc., ak4115 Datasheet - Page 26

• Manufacturer Part Number: ak4115
• Description: High Feature 192khz 24bit Digital Audio Interface Transceiver
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
The AK4115 has two methods for detecting the sampling frequency:
The method is selected by the XTL1,0 pins. When XTL1, 0 = “1,1”, the sampling frequency is detected by the channel
status sampling frequency information. The detected frequency is available on the FS3-0 bits.
MS0573-E-00
Sampling Frequency and Pre-emphasis Detection
FS3
1. Clock comparison between the recovered clock and X’tal oscillator
2. Sampling frequency information from channel status
0
0
0
0
0
0
1
1
1
1
1
Note 37: At least ±3% range is identified as the value in the Table 14. In case of intermediate frequency of those
Note 38: In consumer mode, Byte3 Bit3-0 are copied to FS3-0 bits.
Note 39. In professional mode, FS3-0 bit indicates “0001” except for frequency shown by Table 14.
Register output
FS2
0
0
0
0
1
1
0
0
0
1
1
two, FS3-0 bits indicate no value. When the frequency is ≥ 3% over 192kHz or ≤ 3% under 22kHz,
FS3-0 bits may indicate “0001”, “0101”, “0111” or “1001”.
XTL1
FS1
0
0
1
1
0
0
1
1
0
1
1
0
1
0
1
FS0
0
1
0
1
0
0
1
0
0
0
0
XTL0
0
1
0
1
22.05kHz
176.4kHz
Reserved
44.1kHz
88.2kHz
192kHz
48kHz
32kHz
24kHz
64kHz
96kHz
fs
Table 13. Reference X’tal frequency
(Use channel status)
11.2896MHz
12.288MHz
24.576MHz
Table 14. fs Information
X’tal #1
Except XTL1, 0 = “1,1”
Clock comparison
22.05kHz ± 3%
176.4kHz ± 3%
44.1kHz ± 3%
88.2kHz ± 3%
192kHz ± 3%
- 26 -
48kHz ± 3%
32kHz ± 3%
24kHz ± 3%
64kHz ± 3%
96kHz ± 3%
X’tal Frequency
(Note 37)
-
(Use channel status)
11.2896MHz
22.5792MHz
12.288MHz
X’tal #2
Consumer
Bit3,2,1,0
(Note 38)
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 1 0
1 0 0 0
1 0 1 0
1 1 0 0
1 1 1 0
Byte3
mode
XTL1, 0 = “1, 1”
Default
Bit7,6
Byte0
Professional mode
0 1
1 0
1 1
0 0
0 0
0 0
0 0
0 0
0 0
(Note 39)
(Others)
Bit6,5,4,3
0 0 0 0
0 0 0 0
0 0 0 0
1 0 0 1
0 0 0 1
1 0 1 0
0 0 1 0
1 0 1 1
0 0 1 1
Byte4
[AK4115]
2006/12