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AK4645AEZ Datasheet, PDF (40/85 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP | |||
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[AK4645A]
â à³à¾ÏÎδλϧÏϦϡÊÏ (ÏÏÏ¡ÎϧÏÊÏ
à£)
ALC bit = â0âͷͱÍɺà³à¾ÏÎδλϧÏϦϡÊÏ͸ÏÏÏ¡ÎϧÏÊÏ
ʹͳÎÎ͢ɻÍÍ·ÏÊÏ
͸ÒԼͷà§ß¹
Í´à¢à¼»Í Î͢ɻ
1. ϦηοÏÕ²à¦ÞɺALCà²à¡Í´ØÍ¢ÎϨδελàªà°(ZTM1-0, LMTH1-0 bitsͳͲ)ÎߦÍà§ß¹É»
2. αϯÏϦϯάप೾਺ͷมßÍ´àµÍɺϦÏολÊϦΧÏϦपͲͳظALCà²à¡Í´ØÍ¢ÎϨδελมßÎ
ߦÍà§ß¹É»
3. à³à¾ÏÎδλϧÏϦϡÊÏÎÏÏÏ¡ÎϧÏϦϡÊÏÍ±Í Í¯à¢à¼»Í¢Îà§ß¹É»
à³à¾ÏÎδλϧÏϦϡÊÏͷήΠϯà¾Í¸IVL7-0, IVR7-0 bitsÍ°àªà°Í ÎÍ¢(Table 29)É»ÏϦϡÊÏมßà£ÉºL/R
ಠཱʹθϩΫϩεÝà¥à²à¡ÎߦÍÎ͢ɻθϩΫϩελΠÏÎ΢Ïà£Ø͸ZTM1-0 bitsÍ°àªà°Í¢ÎÍͱÍÍ°ÍÎ
͢ɻ
PMADL = PMADR bits = â0âͷͱÍÍ´IVL7-0, IVR7-0 bitsʹॻÍà ÎÎߦÍͱɺPMADL bit = â1â or PMADR bit
= â1âÍͯÍ×µÍॻʹÎADCͷॳظԽαΠΫϧʹÞɺͦͷàªà°à®Í°IVOLÍà²à¡ÎÖà¢Í Î͢ɻ
à¿¥Ô»ÍÎà ¶à©Í´à©¾ÎସÍͨà§ß¹Éºà¿¥Ô»à£Í·àªà°Íà¸à£ÍÎͯÍÎͷͰɺIVL7-0 = IVR7-0 bits = â91Hâ (0dB)
Í´àªà°Í ͯԼÍÍÉ»
IVL7-0
IVR7-0
GAIN (dB)
Step
F1H
+36.0
F0H
+35.625
EFH
+35.25
:
:
E2H
+30.375
E1H
+30.0
0.375dB (default)
E0H
+29.625
:
:
03H
â53.25
02H
â53.625
01H
â54
00H
MUTE
Table 29. à³à¾ÏÎδλϧÏϦϡÊÏÍ·àªà°à®
MS0986-J-00
- 40 -
2008/07
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