AK4642VN Datasheet, PDF(40/82 Page) Asahi Kasei Microsystems – 16-Bit ΔΣ Stereo CODEC with MIC/HP/SPK-AMP

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AK4642VN Datasheet, PDF (40/82 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Stereo CODEC with MIC/HP/SPK-AMP

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ASAHI KASEI

[AK4642]

IVL7-0, IVR7-0 bitsÍ·à¥»Íà ÎÎà¬ÍÍ¯ß¦Íà§ß¹Í¸ÉºÎ¸Ï©Î«Ï©ÎµÎ»Î ÏÎÎ¢Ïà£ØÒà§Í·ØÖ´ÎÍÍÍ¯ß¦Í¬Í¯

Ô¼ÍÍÉ»à¥´à°Í·ØÖ´ÎÍÍÍ³ÍÍ°à¥»Íà ÎÎß¦ÍÍ±ÉºÎ¸Ï©Î«Ï©ÎµÎ§Î¢Ï¯Î»ÍàºÕ³Ï¦Î·Î¿ÏÍÎÏÏ¦Ï¡ÊÏÍ

à©¾Îà¬¸ÎÎÎÍ¤ÎÉ»Í¨Í©Í Éºà¥»Íà ÎÏ¨Î´ÎµÎ»à®Íàª²Õ³Í±à²Í¡à®Í·à§ß¹Í¸à¥»Íà ÎÍà»à¢¹ÍÎÉºÎ¸Ï©Î«Ï©Îµ

Î§Î¢Ï¯Î»Í¸Ï¦Î·Î¿ÏÍÎÍ³ÍÍ·Í°ÉºÎ¸Ï©Î«Ï©ÎµÎ»Î ÏÎÎ¢Ïà£ØÎÎà¹ÍØÖ´Í°à¥»Íà ÎÎß¦ÍÍÍ±ÍÍ°Í

ÎÍ¢É»

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 25. ALCà²à¡à®¤Í·IVOLà²à¡à¾«

(1) ALCÖà¢à£Í´IVLÍ±IVRÍ·à®ÍÒÍ³Í¬Í¯ÍÎà§ß¹Í¸ÉºIVLÍ·à®ÍÎµÎ»ÊÏà®Í´Í³ÎÎÍ¢É»ALC bit = â1âÎ

à¥»Íà ÎÍ°ÍÎIVL7-0 bitsÍ·à®Í°ALCà²à¡ÎÖà¢Í¢ÎÎÍ°Í·à¬´Íªà£ØÍ¸à ·àÍ°Ï¦Î§ÏÏ¦à¬´Øà£Ø»

(WTM1-0 bits) + Î¸Ï©Î«Ï©ÎµÎ»Î ÏÎÎ¢Ïà£Ø(ZTM1-0 bits)Í°Í¢É»

(2) ALCà²à¡à®¤Í¸ÉºIVL, IVRÍ·Ï¨Î´ÎµÎ»(09H, 0CH)Í´à¥»Íà ÎÎß¦Í¬Í¯ÎàµÓ©ÍÎÎÍ¤ÎÉ»ALCÍDisableÍ

ÎÍ¨ÞÉºÎ¸Ï©Î«Ï©ÎµÎÍ¨Í¸Î¸Ï©Î«Ï©ÎµÎ»Î ÏÎÎ¢Ïà£Í´Í¦Í·à®ÍàµÓ©ÍÎÎÍ¢É»à ¶à±ALCÎEnableÍ¢Î

à§ß¹Í¸ÉºALC bit = â0âÍ·ÞÉºÎ¸Ï©Î«Ï©ÎµÎ»Î ÏÎÎ¢Ïà£ØÒà§Í·ØÖ´ÎÛÍÍ¯ALC bit = â1âÎàªà°Í Í¯Ô¼

ÍÍÉ»

MS0358-J-02

- 40 -

2005/04

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