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AK4343VN Datasheet, PDF (65/99 Pages) Asahi Kasei Microsystems – Stereo DAC with HP/RCV/SPK-AMP | |||
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[AK4343]
(2) I2CÏείϯÏÏ©ÊϧÏÊÏ
(I2C pin = âHâ)
AK4343Í·I2CÏεÏÊÏ
Í·ÏÎ¥ÊÏοÏ͸ɺߴà¬ÏÊÏ
(max:400kHz)Í´à¬°Ô Í Í¯ÍÎ͢ɻSDA, SCL pinsÍ·Ï
ϧÎοÏà°ß
Í·àªà¬àªÍ¸(DVDD+0.3)VÒÔ¼Í´Í Í¯Ô¼ÍÍÉ»
(2)-1. WRITEà»à¾©
I2CÏεÏÊÏ
Í´ÍÍÎÏÊλॻÍà ÎγÊÎϯε͸Figure 63Í´à£ÍÎÎ͢ɻÏεà§Í·ICÎÍ·ÎΫηεʹ͸ɺ
à ·à¥³Í´Öà¢à§Ý
(Start Condition)Îà³à¾Í Î͢ɻSCLÏ¥Î Ï¯Í âHâÍ·à£Í´SDAϥΠϯΠâHâÍÎ âLâÍ´Í¢Îͱɺ
Öà¢à§Ý
Íà¡ÎÎÎÍ¢(Figure 69)É»Öà¢à§Ý
Í·ÞɺεϨÊÏÎÏ
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Ϩε͸7Ïο
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ÏοÏ͸ÎΫηε͢ÎICÎબͿͨÎÍ·ÎÏ
ϨεÏοÏͰɺCAD0 pinÍ´ÎÎàªà°ÍÎÎÍ¢(Figure 64)É»ÎÏ
Ϩ
εÍÒ°à®Í ͨà§ß¹ÉºAK4343͸֬à³Ô à±´(Acknowledge)Îà©à©Í ɺà»à¾©Í࣮ߦÍÎÎ͢ɻÏελ͸֬à³Ô ౴༻
ͷΫϩοΫÏϧεÎà©à©Í ɺSDAϥΠϯÎÕ²à¹Í ͳÍÎ͹ͳÎÎͤÎ(Figure 70)É»R/W bitÍ â0âÍ·à§ß¹Í¸Ï
ÊλॻÍà ÎɺR/W bitÍ â1âÍ·à§ß¹Í¸ÏÊλಡÎà¥Í ÎߦÍÎ͢ɻ
à2ÏÎ Ï͸αÏÎÏ
Ϩε(ϨδελÎÏ
Ϩε)Ͱ͢ɻαÏÎÏ
Ϩε͸8ÏοÏɺMSB firstÍ°ßà©ÍÎɺà§Ò2
ÏοÏ͸ â0âÝ»à°Í°Í¢(Figure 65)É»à3ÏÎ ÏÒ߱͸ίϯÏÏ©ÊϧÏÊλͰ͢ɻίϯÏÏ©ÊϧÏÊλ͸8ÏοÏɺ
MSB firstÍ°ßà©ÍÎÎÍ¢(Figure 66)É»AK4343͸ɺ֤ÏÎ Ïͷड৴ÎÍ¢à¾×¬Îͨͼʹ֬à³Ô à±´Îà©à©Í Î͢ɻ
ÏÊλసૹ͸ɺà¶Í£ÏελÍà©à©Í¢Îà°à¢à§Ý
(Stop Condition)Í´Îͬͯऴà¾Í Î͢ɻSCLÏ¥Î Ï¯Í âHâÍ·à£
Í´SDAϥΠϯΠâLâÍÎ âHâÍ´Í¢Îͱɺà°à¢à§Ý
Íà¡ÎÎÎÍ¢(Figure 69)É»
AK4343͸ෳ਺ͷÏÎ ÏÍ·ÏÊλÎÒ°à±Í´à¥»Íà ÎÍͱÍÍ°ÍÎ͢ɻÏÊλÎ1ÏÎ ÏૹͬͨÞɺà°à¢à§Ý
Î
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Ϩε â24HâÍ´ÏÊλÎॻÍà ÎÍ©ÞɺÍÎÍ´à£Í·ÎÏ
ϨεʹॻÍà ÎÍ©à§ß¹Í´Í¸ÎÏ
Ϩεâ00HâÍ´ÏÊλÍॻÍà ÎÎÎ͢ɻ
Î«Ï©Î¿Î«Í âHâÍ·Ø͸ɺSDAϥΠϯͷà§à¬¶Í¸Ò°à°Í°Í³ÍÎ͹ͳÎÎͤÎÉ»ÏÊÎ»Ï¥Î Ï¯Í âHâͱ âLâÍ·ØÍ°
à§à¬¶ÎมßÍ°ÍÎͷ͸ɺSCLÏ¥Î Ï¯Í·Î«Ï©Î¿Î«à§´ß¸Í âLâÍ·à£Í´Ý¶ÎÎÎÍ¢(Figure 71)É»SCLÏ¥Î Ï¯Í âHâÍ·
à£Í´SDAϥΠϯÎมßÍ¢Îͷ͸ɺÖà¢à§Ý
ɺà°à¢à§Ý
Îà³à¾Í¢ÎͱÍÍ·ÎͰ͢ɻ
S
T
S
A
R/W="0"
T
R
O
T
P
SDA
Slave
S Address
Sub
Address(n)
Data(n)
Data(n+1)
Data(n+x)
P
A
A
A
A
A
A
C
C
C
C
C
C
K
K
K
K
K
K
Figure 63. I2CÏεÏÊÏ
Í·ÏÊλసૹγÊÎϯε
0
0
1
0
0
1 CAD0 R/W
(CAD0͸ÏϯʹÎÎàªà°)
Figure 64. à1ÏÎ ÏÍ·ßà©
0
0
A5
A4
A3
A2
A1
A0
Figure 65. à2ÏÎ ÏÍ·ßà©
D7
D6
D5
D4
D3
D2
D1
D0
Figure 66. à3ÏÎ ÏÒ߱ͷßà©
MS0478-J-02
- 65 -
2010/11
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