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AK4368 Datasheet, PDF (44/58 Pages) Asahi Kasei Microsystems – PLL & HP-AMP DAC | |||
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ASAHI KASEI
[AK4368]
(2) I2CÏείϯÏÏ©ÊϧÏÊÏ
(I2C pin = âHâ)
AK4368Í·I2CÏεÏÊÏ
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(max:400kHz, Ver1.0)Í´à¬°Ô Í Í¯ÍÎ͢ɻ
(2)-1. WRITEà»à¾©
I2CÏεÏÊÏ
Í´ÍÍÎÏÊλॻÍà ÎγÊÎϯε͸Figure 36Í´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
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Íà¡ÎÎÎÍ¢(Figure 42)É»Öà¢à§Ý
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ÎICÎબͿͨÎÍ·ÎÏ
ϨεÏοÏͰɺCAD0 pinÍ´ÎÎàªà°ÍÎÎÍ¢(Figure 37)É»ÎÏ
ϨεÍÒ°à®Í ͨà§ß¹Éº
AK4368͸֬à³Ô à±´(Acknowledge)Îà©à©Í ɺà»à¾©Í࣮ߦÍÎÎ͢ɻÏελ͸֬à³Ô ౴༻ͷΫϩοΫÏϧεÎ
à©à©Í ɺSDAϥΠϯÎÕ²à¹Í ͳÍÎ͹ͳÎÎͤÎ(Figure 43)É»R/WÏοÏÍ â0âÍ·à§ß¹Í¸ÏÊλॻÍà ÎɺR/W
ÏοÏÍ â1âÍ·à§ß¹Í¸ÏÊλಡÎà¥Í ÎߦÍÎ͢ɻ
à2ÏÎ Ï͸αÏÎÏ
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Ϩε͸8bitɺMSB firstÍ°ßà©ÍÎɺà§Ò3bit͸ â0â
Ý»à°Í°Í¢(Figure 38)É»à3ÏÎ ÏÒ߱͸ίϯÏÏ©ÊϧÏÊλͰ͢ɻίϯÏÏ©ÊϧÏÊλ͸8bitɺMSB firstÍ°ßà©
ÍÎÎÍ¢(Figure 39)É»AK4368͸ɺ֤ÏÎ Ïͷड৴ÎÍ¢à¾×¬Îͨͼʹ֬à³Ô à±´Îà©à©Í Î͢ɻÏÊλసૹ͸ɺ
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(Stop Condition)Í´Îͬͯऴà¾Í Î͢ɻSCLÏ¥Î Ï¯Í âHâÍ·à£Í´SDAϥΠϯÎ
âLâÍÎ âHâÍ´Í¢Îͱɺà°à¢à§Ý
Íà¡ÎÎÎÍ¢(Figure 42)É»
AK4368͸ෳ਺ͷÏÎ ÏÍ·ÏÊλÎÒ°à±Í´à¥»Íà ÎÍͱÍÍ°ÍÎ͢ɻÏÊλÎ1ÏÎ ÏૹͬͨÞɺà°à¢à§Ý
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ÊϧΦÊÏÍ ÉºÎÏ
Ϩε â00HâÍÎॱʹ֨ೲÍÎÎ͢ɻ
Î«Ï©Î¿Î«Í âHâÍ·Ø͸ɺSDAϥΠϯͷà§à¬¶Í¸Ò°à°Í°Í³ÍÎ͹ͳÎÎͤÎÉ»ÏÊÎ»Ï¥Î Ï¯Í âHâͱ âLâÍ·ØÍ°à§
ଶÎมßÍ°ÍÎͷ͸ɺSCLÏ¥Î Ï¯Í·Î«Ï©Î¿Î«à§´ß¸Í âLâÍ·à£Í´Ý¶ÎÎÎÍ¢(Figure 44)É»SCLÏ¥Î Ï¯Í âHâÍ·à£
Í´SDAϥΠϯÎมßÍ¢Îͷ͸ɺÖà¢à§Ý
ɺà°à¢à§Ý
Îà³à¾Í¢ÎͱÍÍ·ÎͰ͢ɻ
SDA
S
T
S
A
R/W= â0â
T
R
O
T
P
S
Slave
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 36. I2CÏεÏÊÏ
Í·ÏÊλॻÍà ÎγÊÎϯε
0
0
1
0
0
0 CAD0 R/W
(CAD0͸pinÍ´ÎÎàªà°)
Figure 37. à1ÏÎ ÏÍ·ßà©
0
0
0
A4
A3
A2
A1
A0
Figure 38. à2ÏÎ ÏÍ·ßà©
D7
D6
D5
D4
D3
D2
D1
D0
Figure 39. à3ÏÎ ÏÒ߱ͷßà©
MS0409-J-01
- 44 -
2005/08
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