MB85RS256B Datasheet, PDF (2/32 Pages) Fujitsu Component Limited. – 256 K (32 K×8) ビットSPI

MB85RS256B
■ ୺ࢠ഑ྻਤ
CS
SO
WP
GND
(TOP VIEW)
1
2
3
4
8
VDD
7
HOLD
6
SCK
5
SI
(FPT-8P-M02)
ػࢠ୺ ■ೳઆ໌
୺ࢠ൪߸ ୺ࢠ໊
ػೳઆ໌
νοϓηϨΫτ୺ࢠ
νοϓΛબ୒ঢ়ଶʹ͢ΔͨΊͷೖྗ୺ࢠͰ͢ɻCS ͕ “H” Ϩϕϧͷͱ͖ , νοϓ͸ඇબ୒ ( ε
1
CS _{λϯόΠ ) ঢ়ଶͱͳΓ , SO ͸ High-Z ʹͳΓ·͢ɻ͜ͷͱ͖ , ଞͷ୺ࢠͷೖྗ͸ແࢹ͞Ε·͢ɻ}
CS ͕ “L” Ϩϕϧͷͱ͖ , νοϓ͸બ୒ ( ΞΫςΟϒ ) ঢ়ଶͱͳΓ·͢ɻΦϖίʔυೖྗલʹ CS Λ
ཱͪԼ͛Δඞཁ͕͋Γ·͢ɻ
ϥΠτϓϩςΫτ୺ࢠ
3
WP
εςʔλεϨδελ΁ͷॻࠐΈΛ੍͢ޚΔ୺ࢠͰ͢ɻWP ͱ WPEN (ʮ■ εςʔλεϨδε
λʯࢀর ) ͱ͕ؔ࿈ͯ͠ , εςʔλεϨδελͷॻࠐΈΛϓϩςΫτ͠·͢ɻৄࡉͳઆ໌͸ ,
ʮ■ ॻࠐΈϓϩςΫτʯΛࢀর͍ͯͩ͘͠͞ɻ
ϗʔϧυ୺ࢠ
7
HOLD ^{νοϓΛඇબ୒ঢ়ଶʹͤͣʹγϦΞϧೖग़ྗΛ͢ࢭٳΔͱ͖ʹ࢖༻͠·͢ɻHOLD ͕ “L” Ϩ}
ϕϧͷͱ͖ , ϗʔϧυಈ࡞ͱͳΓ , SO ͸ High-Z ʹ , SCK, SI ͸ don’t care ʹͳΓ·͢ɻϗʔϧ
υಈ࡞த͸ CS Λ “L” Ϩϕϧʹอͨͳ͚Ε͹ͳΓ·ͤΜɻ
γϦΞϧΫϩοΫ୺ࢠ
6
SCK _{γϦΞϧσʔλͷೖग़ྗͷͨΊͷΫϩοΫೖྗ୺ࢠͰ͢ɻSI ͸ SCK ͷ্ཱΓΤοδʹಉ͠ظ}
ͯऔΓࠐ·Ε , SO ͸ SCK ͷཱԼΓΤοδʹಉͯ͠ظग़ྗ͞Ε·͢ɻ
5
SI
γϦΞϧσʔλೖྗ୺ࢠ
γϦΞϧσʔλͷೖྗ୺ࢠͰ͢ɻΦϖίʔυ , ΞυϨε , ॻࠐΈσʔλΛೖྗ͠·͢ɻ
γϦΞϧσʔλग़ྗ୺ࢠ
2
SO _{γϦΞϧσʔλͷग़ྗ୺ࢠͰ͢ɻFRAM ϝϞϦηϧΞϨΠͷಡग़͠σʔλ , εςʔλεϨδε}
λͷσʔλ͕ग़ྗ͞Ε·͢ɻελϯόΠ࣌͸ High-Z Ͱ͢ɻ
8
VDD _{ిݯిѹ୺à¢} 
4
GND _{άϥϯυ୺à¢} 
2
DS501-00021-3v0-J