AK4612EQ Datasheet, PDF (52/68 Pages) Asahi Kasei Microsystems – 6/8-Channel Audio CODEC

[AK4612]
(2)-2. READ໋ྩ
R/W bit͕ “1”ͷ৔߹ɺAK4612͸READಈ࡞Λߦ͍·͢ɻࢦఆ͞ΕͨΞυϨεͷσʔλ͕ग़ྗ͞ΕͨޙɺϚε
λ͕ఀࢭ৚݅ΛૹΒͣ֬ೝԠ౴Λੜ੒͢ΔͱɺαϒΞυϨε͕ࣗಈతʹΠϯΫϦϝϯτ͞Εɺ࣍ͷΞυϨε
ͷσʔλΛಡΈग़͢͜ͱ͕Ͱ͖·͢ɻΞυϨε “16H”ͷσʔλΛಡΈग़ͨ͠ޙɺ͞Βʹ࣍ͷΞυϨεΛಡΈ
ग़͢৔߹ʹ͸ΞυϨε “00H”ͷσʔλ͕ಡΈग़͞Ε·͢ɻ
AK4612͸ΧϨϯτΞυϨεϦʔυͱϥϯμϜϦʔυͷ2ͭͷREAD໋ྩΛ͍࣋ͬͯ·͢ɻ
(2)-2-1. ΧϨϯτΞυϨεϦʔυ
AK4612͸಺෦ʹΞυϨεΧ΢ϯλΛ͓࣋ͬͯΓɺΧϨϯτΞυϨεϦʔυͰ͸͜ͷΧ΢ϯλͰࢦఆ͞ΕͨΞ
υϨεͷσʔλΛಡΈग़͠·͢ɻ಺෦ͷΞυϨεΧ΢ϯλ͸࠷ʹޙΞΫηεͨ͠ΞυϨεͷ࣍ͷΞυϨε஋
Λอ͍࣋ͯ͠·͢ɻྫ͑͹ɺ࠷ʹޙΞΫηε(READͰ΋WRITEͰ΋)ͨ͠ΞυϨε͕ “n”Ͱ͋ΓɺͦͷޙΧϨ
ϯτΞυϨεϦʔυΛߦͬͨ৔߹ɺΞυϨε “n+1”ͷσʔλ͕ಡΈग़͞Ε·͢ɻΧϨϯτΞυϨεϦʔυͰ
͸ɺAK4612͸READ໋ྩͷεϨʔϒΞυϨε(R/W bit = “1”)ͷೖྗʹରͯ֬͠ೝԠ౴Λੜ੒͠ɺ࣍ͷΫϩοΫ
͔Β಺෦ͷΞυϨεΧ΢ϯλͰࢦఆ͞ΕͨσʔλΛग़ྗͨ͠ͷͪ಺෦Χ΢ϯλΛ1ͭΠϯΫϦϝϯτ͠·͢Ň
σʔλ͕ग़ྗ͞ΕͨޙŊϚελ͕֬ೝԠ౴Λੜ੒ͤͣఀࢭ৚݅ΛૹΔͱɺREADಈ࡞͸ऴྃ͠·͢ɻ
S
T
A
R/W="1"
R
T
SDA
Slave
S _Address
A
C
K
Data(n)
Data(n+1)
Data(n+2)
MA
MA
MA
AC
AC
AC
S
T
K
S
T
K
S
T
K
E
E
E
R
R
R
Figure 54. ΧϨϯτΞυϨεϦʔυ
S
T
O
P
Data(n+x)
P
MA
MN
AC
AA
S
T
K
E
S
T
E
C
K
R
R
(2)-2-2. ϥϯμϜΞυϨεϦʔυ
ϥϯμϜΞυϨεϦʔυʹΑΓ೚ҙͷΞυϨεͷσʔλΛಡΈग़͢͜ͱ͕Ͱ͖·͢ɻϥϯμϜΞυϨεϦʔ
υ͸READ໋ྩͷεϨʔϒΞυϨε(R/W bit = “1”)Λೖྗ͢ΔલʹɺμϛʔͷWRITE໋ྩΛೖྗ͢Δඞཁ͕͋
Γ·͢ɻϥϯμϜΞυϨεϦʔυͰ͸࠷ॳʹ։࢝৚݅Λೖྗ͠ɺ࣍ʹWRITE໋ྩͷεϨʔϒΞυϨε(R/W bit
= “0”)ɺಡΈग़͢ΞυϨεΛॱ࣍ೖྗ͠·͢ɻAK4612͕͜ͷΞυϨεೖྗʹରͯ֬͠ೝԠ౴Λੜ੒ͨ͠ޙɺ
࠶ૹ৚݅ɺREAD໋ྩͷεϨʔϒΞυϨε(R/W bit= “1”)Λೖྗ͠·͢ɻAK4612͸͜ͷεϨʔϒΞυϨεͷೖ
ྗʹରͯ֬͠ೝԠ౴Λੜ੒͠ɺࢦఆ͞ΕͨΞυϨεͷσʔλΛग़ྗ͠ɺ಺෦ΞυϨεΧ΢ϯλΛ1ͭΠϯΫϦ
ϝϯτ͠·͢ɻσʔλ͕ग़ྗ͞ΕͨޙɺϚελ͕֬ೝԠ౴Λੜ੒ͤͣఀࢭ৚݅ΛૹΔͱɺREADಈ࡞͸ऴྃ
͠·͢ɻ
S
T
A
R/W ="0"
R
T
SDA
Slave
S _Address
Sub
Address(n)
A
C
K
S
T
A
R/W="1"
R
T
Slave
S _Address
A
A
C
C
K
K
Data(n)
Data(n+1)
MA
MA
AC
S
T
K
A
S
T
C
K
E
E
R
R
Figure 55. ϥϯμϜΞυϨεϦʔυ
S
T
O
P
Data(n+x)
P
MA
MN
A
S
T
C
K
A
S
T
A
C
E
EK
R
R
MS1039-J-01
- 52 -
2009/06