AK4184A Datasheet, PDF (12/36 Pages) Asahi Kasei Microsystems – TSC with Keypad Scanner and GPIO Expander

[AK4184A]
■ ΩʔύουεΩϟφ
AK4184A ͷΩʔύουεΩϟφ͸ɺ࠷େ 6 ྻ x 5 ߦͷΩʔύουʹରԠ͠·͢ɻ6 ྻ x 5 ߦΑΓগͳ͍Ωʔݕ
ग़ΛϞχλʔ͢Δ৔߹͸ɺΩʔεΩϟϯલʹྻ͝ͱʹϚεΫ͢Δࣄ΍ΩʔεΩϟϯʹޙΩʔຖʹϚεΫ͢Δ
ࣄ͕ՄೳͰ͢ɻΩʔύουಈ࡞ΛΩʔׂΓࠐΈͱΩʔεΩϟϯʹ෼͚ͯߟ͑·͢ɻ
■ ΩʔׂΓࠐΈݕग़
Ωʔ଴ͪঢ়ଶͰ͸ɺC1 ~ C6 pins͕“H”Λग़ྗ͍ͯ͠·͢ɻR1 ~ R5 pins͸ϓϧμ΢ϯ(Rkey = 16KΩ, Figure 6)͞
Ε͍ͯ·͢ɻ೚ҙͷΩʔΛԡ͠Լ͛Δ͜ͱͰରԠͨ͠R1 ~ R5 pins͕ “H”ʹͳΓ·͢ɻ͜ͷΩʔݕग़ʹΑΓ
KEYIRQN pin͸LowʹυϥΠϒ͞Ε·͢ɻΩʔεΩϟϯ͕ऴྃ͢ΔͱHighʹυϥΠϒ͞Ε·͕͢ɺΩʔύο
υσʔλΛಡΈग़͢·Ͱ͸ɺ࠶ͼΩʔԡ͠Լ͛Λߦͬͯ΋KEYIRQN pin͸ɺLowʹมԽ͠·ͤΜɻ(ΩʔׂΓ
ࠐΈࢭېঢ়ଶ)
■ ΩʔεΩϟϯσʔλಡΈग़͠
ΩʔׂΓࠐΈݕग़ޙɺAK4184A ͸֤Ωʔͷঢ়ଶΛॱ࣍εΩϟϯ͠Ϩδελʹॻ͖ࠐΈ·͢ɻ۩ମతʹ͸ɺC1
pin ͷόοϑΝΛ ON ʹͯ͠ “H”Λग़ྗ͠·͢(Scan Output 1)ɻଞͷ C2 ∼ C6 pins ͸ɺHi-Z ঢ়ଶͰ͢ɻΩʔԡ͠
Լ͛͞Εͨ R1 ~ R5 pins ͸ C1 pin ͱ઀ଓ͠ɺ“H”ʹͳΓ·͢ɻΩʔϦϦʔεͰ R1 ~ R5 pins ͸ɺ“L”ʹͳΓ·
͢ɻR1 ∼ R5 pins (Sense Input 1)ͷೖྗϨϕϧΛεΩϟϯͯ͠಺෦ϨδελʹऔΓࠐΈ·͢ɻ2 ͭͷΩʔΛಉ࣌
ʹԡͨ͠৔߹͸ɺରԠͨ͠ R1 ~ R5 pin ͕ “H”ʹͳΓ·͢ɻ࣍ʹಉ༷ʹ C2 pin Λ “H”ʹͯ͠(Scan Output 2)ɺ
R1 ∼ R5 pins ͷೖྗϨϕϧΛεΩϟϯ͠ϨδελʹऔΓࠐΈ·͢(Sense Input 2)ɻ͜ͷ Scan Output ͱ Sense Input
Λ༗ޮͳྻ(Column)܁ͰΓฦ͠Λߦ͍ɺ಺෦ϨδελʹऔΓࠐΈ·͢ɻ
ΩʔεΩϟϯ͸ Debounce Time ʹޙ࠷Ұ࿈ͷ Scan Output/ Sense Input ͷαΠΫϧΛ 1 ճߦ͍ɺͦͷ಺ޙ෦Ϩδ
ελʹ஋ΛऔΓࠐΈ·͢ɻϗετϓϩηοα͸ɺΩʔύουεΩϟϯ͕ऴྃͨ͠ࣄΛ֬ೝͯ͠σʔλϨδε
λͷಡΈग़͠Λ։࢝͠·͢ɻσʔλϨδελΛಡΈग़͢·Ͱ͸ɺ৽ͨʹΩʔύουεΩϟϯΛ܁Γฦ͢ࣄ͸
Ͱ͖·ͤΜɻ
MS0947-J-00
-12-
2008/04