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AK4645AEZ Datasheet, PDF (41/85 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP | |||
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[AK4645A]
IVL7-0, IVR7-0 bitsͷॻÍà ÎÎà¬ÍͯߦÍà§ß¹Í¸ÉºÎ¸Ï©Î«Ï©ÎµÎ»Î ÏÎ΢Ïà£ØÒà§Í·ØÖ´ÎÍÍͯߦͬͯ
Ô¼ÍÍɻॴà°Í·ØÖ´ÎÍÍͳÍͰॻÍà ÎÎߦÍͱɺθϩΫϩεΧ΢ϯλÍàºÕ³Ï¦Î·Î¿ÏÍÎÏϦϡÊÏÍ
੾ÎସÎÎÎͤÎÉ»Í¨Í©Í Éºà¥»Íà ÎϨδελà®Íલճͱà²Í¡à®Í·à§ß¹Í¸Î¸Ï©Î«Ï©ÎµÎ§Î¢Ï¯Î»Í¸Ï¦Î·Î¿ÏÍ
ÎͳÍͷͰɺθϩΫϩελΠÏÎ΢Ïà£ØÎÎà¹ÍØִͰॻÍà ÎÎߦÍÍͱÍÍ°ÍÎ͢ɻ
ALC bit
ALC Status
Disable
Enable
Disable
IVL7-0 bits
E1H(+30dB)
IVR7-0 bits
C6H(+20dB)
Internal IVL
Internal IVR
E1H(+30dB)
C6H(+20dB)
E1(+30dB) --> F1(+36dB)
(1)
E1(+30dB) --> F1(+36dB)
E1(+30dB)
(2)
C6H(+20dB)
Figure 30. ALCà²à¡à®¤Í·IVOLà²à¡à¾«
(1) ALCÖà¢à£Í´IVLͱIVRÍ·à®ÍÒͳͬͯÍÎà§ß¹Í¸ÉºIVLÍ·à®ÍελÊÏà®Í´Í³ÎÎ͢ɻALC bit = â1âÎ
ॻÍà ÎÍ°ÍÎIVL7-0 bitsÍ·à®Í°ALCà²à¡ÎÖà¢Í¢ÎÎͰͷ଴ͪà£ØÍ¸à ·àͰϦΧÏϦ଴Øà£Ø»
(WTM2-0 bits) + θϩΫϩελΠÏÎ΢Ïà£Ø(ZTM1-0 bits)Ͱ͢ɻ
(2) ALCà²à¡à®¤Í¸ÉºIVL, IVRͷϨδελ(09H, 0CH)ʹॻÍà ÎÎߦͬͯÎàµÓ©ÍÎÎͤÎÉ»ALCÍDisableÍ
ÎͨÞɺθϩΫϩεÎͨ͸θϩΫϩελΠÏÎ΢Ïà£Í´Í¦Í·à®ÍàµÓ©ÍÎÎÍ¢É»à ¶à±ALCÎEnableÍ¢Î
à§ß¹Í¸ÉºALC bit = â0âÍ·ÞɺθϩΫϩελΠÏÎ΢Ïà£ØÒà§Í·ØÖ´ÎÛÍͯALC bit = â1âÎàªà°Í ͯԼ
ÍÍÉ»
MS0986-J-00
- 41 -
2008/07
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