ak4141 AKM Semiconductor, Inc., ak4141 Datasheet - Page 87

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

ASDMT[7:0]
ASDFT[7:0]
ASQT[7:0]
MS0952-E-00
Addr
Addr
Addr
8BH
8CH
8DH
ASD threshold of carrier magnitude. This 8-bit threshold is compared against the top 11 bits of carrier 1 & 2 average
magnitude values that are the same as CR1M and CR2M except that their settling times are one-fourth as long. The
threshold is extended to 11 bits by concatenating three zeros above its MSB.
ASD threshold of carrier average frequency. This 8-bit threshold is compared against the absolute value of the top
10 bits of carrier 1 & 2 average frequency (CR1F[15:6], CR2F[15:6]). The threshold is extended to 10 bits by
concatenating two zeros above its MSB.
Carrier FM quality ASD threshold. This 8-bit threshold is is zero extended to 13 bits by concatenating 5 zeros above
its MSB and then it is compared against the top 13 bits of carrier 1 & 2 FM quality
Carrier FM Quality ASD Threshold
Carrier Magnitude ASD Threshold
Carrier1Quality[15:3]
Carrier Freq ASD Threshold
Register Name
Register Name
Register Name
Default
Default
Default
ASQTh[7:0]
R/W
R/W
R/W
0
13
Figure 29. Carrier Quality Threshold
5
8
[12:0]
[12:8]
[7:0]
compare
D7
D7
D7
>=
- 87 -
D6
D6
D6
D5
D5
D5
ASDMT[7:0]
ASDFT[7:0]
Carrier1QualityGood
ASQT[7:0]
00011001
00011000
00000000
D4
D4
D4
R/W
R/W
R/W
values(Figure
D3
D3
D3
D2
D2
D2
29,
Table
D1
D1
D1
[AK4141]
2008/05
105)
D0
D0
D0