ak4141 AKM Semiconductor, Inc., ak4141 Datasheet - Page 81

• Manufacturer Part Number: ak4141
• Description: Nicam/a2/eia-j Digital Stereo Decoder
• Manufacturer: AKM Semiconductor, Inc.

CR2F[15:0]
CR2M [15:0]
MS0952-E-00
Addr
Addr
6CH
6DH
6EH
6FH
Carrier 2 average frequency. Represents the difference between the nominal carrier frequency and the actual carrier
frequency (2’s complement.)
Ferr = Frequency error. Difference between nominal and actual carrier frequencies (Hz)
Fac = Actual frequency of carrier to be demodulated (Hz)
Fc = Nominal carrier frequency set in DM2F (Hz)
Fs = Input sample rate (Hz), see the Sample Rate Register table
to the selected output sample rate.
When reading these registers, always read the high byte first. The low byte is only updated when the high byte is
read. This ensures that the values read from the two registers come from the same 16-bit word.
Carrier 2 average magnitude.
When reading these registers, always read the high byte first. The low byte is only updated when the high byte is
read. This ensures that the values read from the two registers come from the same 16-bit word.
CR2M
Ferr = CR2F x Fs x 2
Fac = Fc + Ferr
Carrier 2 Average Magnitude 1
Carrier 2 Average Magnitude 0
Carrier 2 Average Frequency 1
Carrier 2 Average Frequency 0
= Portion of full scale x 1.647
Register Name
Register Name
Default
Default
R/W
R/W
CR2M
0xAD9B
0x7AE8
0x2B9C
0x1EDF
0x15DB
0x3D99
0x0AF4
0x057D
0x07C1
0x5702
0x0F79
[15:0]
-20
Table 99. Carrier 2 average magnitude
2
x 2
Average Carrier Magnitude (dBFS)
(Hz)
14
(Hz)
(unsigned)
D7
D7
- 81 -
-12
-15
-18
-21
-24
-27
-30
-3
-6
-9
D6
D6
0
(Table
D5
D5
45) for the input sample rate that corresponds
CR2M[15:8]
CR2F[15:8]
CR2M[7:0]
CR2F[7:0]
00000000
00000000
D4
D4
RD
RD
D3
D3
D2
D2
D1
D1
[AK4141]
2008/05
D0
D0