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AK4589 Datasheet, PDF (68/76 Pages) Asahi Kasei Microsystems – 2/8 CHANNEL AUDIO CODEC WITH DIR | |||
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ASAHI KASEI
[AK4589]
(2) I2CÏείϯÏÏ©ÊϧÏÊÏ
(I2C pin = âHâ)
AK4589Í·I2CÏεÏÊÏ
Í·ÏÎ¥ÊÏοÏ͸ɺඪ४ÏÊÏ
(max:100kHz)Ͱ͢ɻà¥Í¬Í¯ß´à¬ÏÊÏ
(max:400kHz)
ͷγεÏÏà§Í°Í¸à¢à¼»Í°ÍÎͤÎÉ»ADC/DAC෦ͷϨδελ͸ϦÊÏ
Í°ÍÎͤÎÉ»
(2)-1 ÏÊλసૹʹÍÍͯ
Ïεà§Í·ÌÌÎÍ·ÎÎ«Î·ÎµÍ´Í¸Éºà ·à¥³Í´ÎµÎ»ÊÏ·ίϯÏÎγϣϯÎà³à¾Í Î͢ɻà£Í´Éº1ÏÎ ÏÍ°ßà©ÍÎ
ÎÏÏΠεͷÎÏ
ϨεÎØÎͩεϨÊÏ·ÎÏ
ϨεÎà³à¾Í Î͢ɻÍÍ·à£ÉºÏεà§Í·ÌÌ͸ÍÍ·ÎÏ
Ϩεͱà£
à·¼à£à¨Í·ÎÏ
ϨεÎàµºÖ±Í ÉºÎÏ
ϨεÍÒ°à®Í ͨÌÌ͸ÎΫÏϦοδÎà©à©Í Î͢ɻÎÏ
ϨεÍÒ°à®Í ͨÌ
Ì͸ɺÍÍ·ÞREADຢ͸WRITEÎà£®ß¦Í Î͢ɻà»à¾©à¤´à¾à£Í´Í¸ÉºÎµÏοÏ·ίϯÏÎγϣϯÎà³à¾Í ͯԼÍÍÉ»
(2)-1-1. ÏÊλͷมß
SDAϥΠϯͷÏÊλมß͸SCLÏ¥Î Ï¯Í âLâÍ·ØʹߦͬͯԼÍÍÉ»Î«Ï©Î¿Î«Í âHâÍ·Øʹ͸SDAϥΠϯͷà§
ଶ͸Ұà°Í°Í³ÍÎ͹ͳÎÎͤÎÉ»ÏÊÎ»Ï¥Î Ï¯Í âHâͱ âLâÍ·ØÍ°à§à¬¶ÎมßÍ°ÍÎͷ͸SCLϥΠϯͷΫϩ
Î¿Î«à§´ß¸Í âLâÍ·à£Í´Ý¶ÎÎÎ͢ɻSCLÏ¥Î Ï¯Í âHâÍ·à£Í´SDAϥΠϯÎมßÍ¢Îͷ͸ɺελÊÏ·ίϯÏÎ
γϣϯɺεÏοÏ·ίϯÏÎγϣϯÎà³à¾Í¢ÎͱÍÍ·ÎͰ͢ɻ
SCL
SDA
DATA LINE
STABLE :
DATA VALID
CHANGE
OF DATA
ALLOWED
Figure 41. ÏÊλͷมß
(2)-1-2. ελÊÏÅίϯÏÎγϣϯͱεÏοÏÅίϯÏÎγϣϯ
SCLÏ¥Î Ï¯Í âHâÍ·à£Í´SDAϥΠϯΠâHâÍÎ âLâÍ´Í¢ÎͱɺελÊÏ·ίϯÏÎγϣϯÍà¡ÎÎÎ͢ɻશͯ
Í·à»à¾©Í¸ÉºÎµÎ»ÊÏ·ίϯÏÎγϣϯÍÎà¢ÎÎÎ͢ɻSCLÏ¥Î Ï¯Í âHâÍ·à£Í´SDAϥΠϯΠâLâÍÎ âHâÍ´
Í¢ÎͱɺεÏοÏ·ίϯÏÎγϣϯÍà¡ÎÎÎ͢ɻશͯͷà»à¾©Í¸ÉºÎµÏοÏ·ίϯÏÎγϣϯʹÎÎऴà¾Í Î͢ɻ
SCL
SDA
START CONDITION
STOP CONDITION
Figure 42. ελÊÏ·ίϯÏÎγϣϯͱεÏοÏ·ίϯÏÎγϣϯ
MS0339-J-00
- 68 -
2004/09
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