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AK4141 Datasheet, PDF (68/96 Pages) Asahi Kasei Microsystems – NICAM/A2/EIA-J Digital Stereo Decoder | |||
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CONFIDENTIAL
[AK4141]
Addr
53H
Register Name
Status
R/W
Default
D7
ASDC
RD
0
D6
D5
D4
D3
D2
D1
D0
BI IMONO MONO
SNDST[1:0]
C2DET C1DET
RD
RD
RD
RD
RD
RD
RD
0
0
0
0
0
0
0
ASDC:
â1âã§ASD(Automatic Standard Detection)å®äºã表ãã¾ãã
BI:
â1âã§2ã«å½èªãæ¤åºããããã¨ã表ãã¾ãã以ä¸ã®æ¡ä»¶ã®ããããã§âHâã«ãªãã¾ãã
1) SYS[3:0] ã EIAJ è¥ãã㯠A2 ã示ããã㤠ID signal (AMOD[1:0])ã 2 ã«å½èª(â10â)ã示ããæã
2) SYS[3:0] ã NICAM ãã¤è¯å¥½ãªåä¿¡ç¶æ
ã示ããã㤠NICT[2:1]ã 2 ã«å½èª(â10â)ã示ããæã
IMONO
â1â㧠independent mono soundãæ¤åºããããã¨ã表ãã¾ã (NICAMæã®ã¿). NICT bitã®å¤ã 0xa, 0x2, 0x1,
0x0㧠â1âã«ãªãã¾ãã
MONO:
â1âã§ã¹ãã¬ãªä¿¡å·ãæ¤åºããããã¨ã表ãã¾ãã以ä¸ã®æ¡ä»¶ã®ããããã§âHâã«ãªãã¾ãã
1) SYS[2:0] ã EIAJè¥ããã¯A2ã示ãããã¤ID signal (AMOD[1:0])ãã¹ãã¬ãªä¿¡å·(â01â)ã示ããæã
2) SYS[2:0] ãNICAMãã¤è¯å¥½ãªåä¿¡ç¶æ
ã示ãããã¤NICT[2:1]ãã¹ãã¬ãªä¿¡å·(â00â)ã示ããæã
SNDST[1:0]:
é©ç¨ãããé³å£°è¦æ ¼ã®ç¶æ
ã表ãã¾ãã
SNDST[1:0]
00
01
10
11
Status
Analog Sound Standard (AM/FM) active
Bad reception condition of analog sound
Digital Sound (NICAM) available
Bad reception condition of digital sound
Table 69. Sound Status
C2DET:
â1âã§æå¹ãªç¬¬äºãã£ãªã¢(2nd A2 carrier)ãæ¤åºããããã¨ã表ãã¾ãã
C1DET:
â1âã§æå¹ãªç¬¬ä¸ãã£ãªã¢ãæ¤åºããããã¨ã表ãã¾ãã
MS0952-J-03
- 68 -
2013/12
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