MB85RC256V Datasheet, PDF (5/32 Pages) Fujitsu Component Limited. – 256 K (32 K×8) ビットI2C

MB85RC256V
■ σόΠεɾΞυϨεɾϫʔυ (Slave address)
ελʔτɾίϯσΟγϣϯʹଓ͍ͯ , 8 ϏοτͷσόΠεɾΞυϨεɾϫʔυΛೖྗ͠·͢ɻ͜ͷೖྗͰ , σόΠε͸ಡग़
͠·ͨ͸ॻࠐΈಈ࡞ͷ͍ͣΕ͔Λܾఆ͠·͢ɻσόΠεɾΞυϨεɾϫʔυ (8 Ϗοτ ) ͸ , σόΠεɾίʔυ (4 Ϗοτ ), σ
όΠεɾΞυϨείʔυ (3 Ϗοτ ), Read / Write ίʔυ (1 Ϗοτ ) ͷ 3 ίʔυͰߏ੒͞Ε·͢ɻ
ɾσόΠεɾίʔυ (4 Ϗοτ )
σόΠεɾΞυϨεɾϫʔυͷ্Ґ 4 Ϗοτ͸σόΠεɾλΠϓΛࣝผ͢ΔσόΠεɾίʔυͰ , ຊ੡඼Ͱ͸ “1010” ݻͰ
ఆͰ͢ɻ
ɾσόΠεɾΞυϨεɾίʔυ (3 Ϗοτ )
σόΠεɾίʔυʹଓ͚ͯσόΠεɾΞυϨεɾίʔυ (3 Ϗοτ ) Λ A2, A1, A0 ͷॱʹೖྗ͠·͢ɻσόΠεɾΞυϨεɾ
ίʔυ͸ , όεʹ࠷େ 8 ઀ݸଓ͞ΕͨσόΠεͷ͏ͪ , ͲΕΛબ୒͢Δ͔Λܾఆ͠·͢ɻσόΠεΞυϨε୺ࢠʹ͸ , 3 Ϗο
τͷϢχʔΫͳ஋ΛׂΓৼΓ·͢ɻσόΠεΞυϨε୺ࢠʹׂΓৼΒΕͨ͜ͷ஋ͱೖྗ͞ΕͨσόΠεɾΞυϨεɾίʔυ
ͱ͕Ұகͨ͠σόΠε͕બ୒͞Ε·͢ɻ
ɾRead/Write ίʔυ (1 Ϗοτ )
σόΠεɾΞυϨεɾϫʔυͷ 8 Ϗοτ໨͸ , R/W (Read/Write) ίʔυͰ͢ɻ“0” ೖྗͷ৔߹͸ॻࠐΈಈ࡞ , “1” ೖྗͷ৔
߹͸ಡग़͠ಈ࡞Ͱ͢ɻͳ͓ , σόΠεɾίʔυ͕ “1010” Ͱͳ͍৔߹ , ΋͘͠͸σόΠεɾΞυϨεɾίʔυ͕Ұக͠ͳ͍৔߹
͸,
ಡग़͠ / ॻࠐΈಈ࡞ʹೖΒͣελϯόΠঢ়ଶͷ··Ͱ͢ɻ
ɾσόΠεɾΞυϨεɾϫʔυ
Start 1 2 3 4 5 6 7 8 9 1 2
SCL
..
SDA
ACK
S ^{1 0 1 0} A2 A1 A0 R/W A
..
σόΠεɾίʔυ σόΠεɾΞυϨεɾ ^{Read/Write ίʔÏ}
ίʔυ
Ϛελ͔ΒͷΞΫηε
εϨʔϒ͔ΒͷΞΫηε
S ^{ελʔτɾίϯσΟγϣϯ}
A ^{ACK (SDA ͕ “L” Ϩϕϧ )}
■ σʔλߏ੒
I²C Ͱ͸ , Ϛελ͕ελʔτɾίϯσΟγϣϯʹଓ͖σόΠεɾΞυϨεɾϫʔυ (8 Ϗοτ ) Λೖྗͨ͠ ޙ, εϨʔϒ͕
9 Ϗοτ໨ʹ ACK“L” ϨϕϧΛग़ྗ͠·͢ɻϚελ͸ ACK Ԡ౴Λ֬ೝͨ͠ ޙ, ଓ͍ͯ 8 Ϗοτ ×2 ͷϝϞϦ • ΞυϨεΛೖ
ྗ͠·͢ɻ
ϝϞϦɾΞυϨεͷೖྗ͝ͱʹ , εϨʔϒ͸࠶ͼ ACK“L” ϨϕϧΛग़ྗ͠·͢ɻ͜ͷ ޙ, ೖग़ྗͷσʔλ͕ 8 Ϗοτ୯Ґ
Ͱଓ͖ , Ҏ߱ 8 Ϗοτ͝ͱʹ ACK“L” ϨϕϧΛग़ྗ͠·͢ɻ
σόΠεɾΞυϨεɾϫʔυͷ 8 Ϗοτ໨ , R/W ίʔυʹैͬͯ , σʔλϥΠϯΛϚελͱεϨʔϒͲͪΒ͕ۦಈ ͢Δ͔
Λܾఆ͠·͢ɻͨͩ͠ , ΫϩοΫ͸ඞͣϚελ͕ۦಈ͠·͢ɻॻࠐΈಈ࡞࣌͸ , εϨʔϒ͕Ϛελʔ͔Β 8 ϏοτΛड৴͠
ޙͨ, ACK ৴߸Λฦ͠·͢ɻϚελʔ͕ͦͷ ACK ৴߸Λ֬ೝͨ͠ ޙ, ࣍ͷ 8 ϏοτΛૹ৴͠·͢ɻಡग़͠ಈ࡞࣌͸ , εϨʔ
ϒ͕ 8 ϏοτΛૹ৴ͨ͠ ޙ, Ϛελʔ͔Βͷ ACK ৴߸Λ଴ͪ·͢ɻ
DS501-00017-4v0-J
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