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MB85RC64V Datasheet, PDF (4/32 Pages) Fujitsu Component Limited. – 64 K (8 K×8) ビットI2C | |||
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MB85RC64V
â I2C ௨৴ͷÖà¢Í±à¤´à¾
I2C Ïε͸ , 2 ઢͩÍͰ௨৴Î࣮͢ݱÎͨΠ, SDA à³à¾Í·à©¾ÎÍ׵ΠSCL Í âLâ ϨÏϧͷÍÍÍ©Íͯͬߦʹ಺Øظɻ
Í¨Í©Í à¾«Öతʹ , ௨৴ͷÖà¢Í±à¤´à¾Í´ÍÍͯ͸ SCL Í âHâ ϨÏϧͷ ʹ಺ØظSDA Î੾ÎÍÍÍ©ÍͯÍ׵ɻ
ɾελÊÏɾίϯÏÎγϣϯ
I2C ÏεÍɼಡà¥Í Îͨ͸ॻà ÎÍ·à²à¡ÎÖà¢Í¢Îʹ͸ , SCL à³à¾Í âHâ ϨÏϧͷ Í´Øظ, SDA à³à¾Î âHâ ϨÏϧÍÎ
âLâ ϨÏϧʹàªà°Í ͯÍÍ©ÍÍÉ»
ɾεÏοÏɾίϯÏÎγϣϯ
I2C Ïεͷ௨৴Îऴà¾Í¢Îʹ͸ , SCL à³à¾Í âHâ ϨÏϧͷ Í´Øظ, SDA à³à¾Î âLâ ϨÏϧÍÎ âHâ ϨÏϧʹàªà°Í ͯÍ
Í©ÍÍɻಡà¥Í à²à¡Í·à§ß¹Í´Í¸ , εÏοÏɾίϯÏÎγϣϯÎà³à¾Í¢ÎÍͱͰಡà¥Í Íऴà¾Í , ελϯÏÎ à§à¬¶Í´Í³ÎÎ
͢ɻ
ॻà Îà²à¡Í·à§ß¹Í´Í¸ , εÏοÏɾίϯÏÎγϣϯà³à¾Í°à¥»Í×µÏÊλͷà³à¾Íऴà¾Í , ελϯÏÎ à§à¬¶Í´Í³ÎÎ͢ɻ
ɾελÊÏɾίϯÏÎγϣϯ , εÏοÏɾίϯÏÎγϣϯ
SCL
SDA
H or L
Start
Stop
ʢ஫Òà£ß²Ê£FRAM ÏÏΠεͰ͸ॻà Îà²à¡à£ , εÏοÏɾίϯÏÎγϣϯÞÍ·ÏÏϦॻà Î଴ͪ Øظ(tWC) ͸à¶à½ÍÎÎ
ͤÎÉ»
â ÎΫÏϦοδ (ACK)
I2C Ͱ͸ , ÎÏ
Ϩεà§à¹Î , ÏÏϦà§à¹Í³Í²Í·Î³Ï¦ÎϧÏÊλΠ8 ÏÎ¿Ï à¯ÒÍ°à«¹à¤¡à§´Í Î͢ɻACK ৴߸ͱ͸ , ÍÍ·
8 ÏοÏÏÊλÍͱʹ , à©à§Í´à«¹à§´ , Îͨ͸ड৴ÍÎͨÍͱÎà£Í¢à§´ß¸Í°Í¢É»8 ÏοÏͷૹड৴ÍߦÎÎÎͨͼ SCL Í· 9 Ϋ
ϩοΫ໨ʹ , ड৴à¬ÍàºÕ³ âLâ ϨÏϧÎà¥à¾Í Î͢ɻૹ৴à¬Í°Í¸ , ÍÍ· 9 ΫϩοΫ໨Ͱ ACK ৴߸Îड৴֬à³Í¢ÎͨΠ, Ò°
à£à°¤Í´ÏεÎÕ²à¹Í Î͢ɻÍÍ·Õ²à¹Øظதʹ , ड৴à¬Í°Í¸ SDA ϥΠϯʹÏϧμ΢ϯÎà¸¦Í Í¯à¯¨à§´Íà©à§Í³ÍͱÎà£Í Î
͢ɻ
Slave à¬Í , ACK âLâ ϨÏÏ§Ô à±´àª²Îͨ͸ड৴લʹεÏοÏɾίϯÏÎγϣϯÎà¤¡à§´Í Í¨à§ß¹ , à²à¡Îऴà¾Í ͯελϯÏ
Î à§à¬¶Í´Í³ÎÎ͢ɻ
Ұ๠, Slave à¬Í¸ , NACK âHâ ϨÏÏ§Ô à±´Í¨ÎÞ͸ड৴ʹÞÏεÎÕ²à¹à§à¬¶Í´Í Î͢ɻMaster à¬Í¸ , ÍÍ·ÏεÖ๠ʹØظ,
εÏοÏɾίϯÏÎγϣϯÎͨ͸ελÊÏɾίϯÏÎγϣϯÎà©à©Í Î͢ɻ
ɾÎΫÏϦοδͷλΠÏϯάàªà»à¨¤
SCL
1
2
3
8
9
SDA
Start
4
ૹ৴à¬Í¸ 9 ÏοÏ໨ʹ , à¶Í£ SDA ÎÕ²à¹Í ͯÍÍ©ÍÍÉ»
ÍͷͱÍड৴à¬Í¸ , à¯àª² 8 ÏοÏͷड৴Íà©à§Í³Î͹Ï
ϧμ΢ϯÎà¥à¾Í ÎÍ¢ (ACK Ô à±´ )É»
ACK
DS501-00013-6v0-J
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