AK4589 Datasheet, PDF (71/76 Pages) Asahi Kasei Microsystems – 2/8 CHANNEL AUDIO CODEC WITH DIR

ASAHI KASEI
[AK4589]
(2)-3. READ໋ྩ
R/W bit͕ “1”ͷ৔߹ɺAK4589͸READಈ࡞Λߦ͍·͢ɻࢦఆ͞ΕͨΞυϨεͷσʔλ͕ग़ྗ͞ΕͨޙɺϚε
λ͕ετοϓ·ίϯσΟγϣϯΛૹΒͣΞΫϊϦοδΛੜ੒͢Δͱɺ࣍ͷΞυϨεͷσʔλΛಡΈग़͢͜ͱ͕
Ͱ͖·͢ɻΞυϨεɿ1FHͷσʔλΛಡΈग़ͨ͠ޙɺ͞Βʹ࣍ͷΞυϨεΛಡΈग़͢৔߹ʹ͸ΞυϨεɿ00H
ͷσʔλ͕ಡΈग़͞Ε·͢ɻADC/DAC෦ͷϨδελ͸ϦʔυͰ͖·ͤΜɻ
AK4589͸ΧϨϯτ·ΞυϨε·ϦʔυͱϥϯμϜ·ϦʔυͷೋͭͷREAD໋ྩΛ͍࣋ͬͯ·͢ɻ
(2)-3-1. ΧϨϯτŋΞυϨεŋϦʔυ
AK4589͸಺෦ʹΞυϨε·Χ΢ϯλΛ͓࣋ͬͯΓɺΧϨϯτ·ΞυϨε·ϦʔυͰ͸͜ͷΧ΢ϯλͰࢦఆ͞Εͨ
ΞυϨεͷσʔλΛಡΈग़͠·͢ɻ಺෦ͷΞυϨε·Χ΢ϯλ͸࠷ʹޙΞΫηεͨ͠ΞυϨεͷ࣍ͷΞυϨε
ͷ஋Λอ͍࣋ͯ͠·͢ɻྫ͑͹ɺ࠷ʹޙΞΫηε(READͰ΋WRITEͰ΋)ͨ͠ΞυϨε͕nͰ͋ΓɺͦͷޙΧ
Ϩϯτ·ΞυϨε·ϦʔυΛߦͬͨ৔߹ɺΞυϨεɿn+1ͷσʔλ͕ಡΈग़͞Ε·͢ɻΧϨϯτ·ΞυϨε·Ϧʔυ
Ͱ͸ɺAK4589͸READ໋ྩͷεϨʔϒ·ΞυϨε(R/W bit = “1”)ͷೖྗʹରͯ͠ΞΫϊϦοδΛੜ੒͠ɺ࣍ͷ
ΫϩοΫ͔Β಺෦ͷΞυϨε·Χ΢ϯλͰࢦఆ͞ΕͨσʔλΛग़ྗͨ͠ͷͪ಺෦Χ΢ϯλΛ1ͭΠϯΫϦϝϯ
τ͠·͢ɻ1όΠτͷσʔλ͕ग़ྗ͞ΕͨޙŊϚελ͕ΞΫϊϦοδΛੜ੒ͤͣετοϓ·ίϯσΟγϣϯΛૹ
ΔͱɺREADಈ࡞͸ऴྃ͠·͢ɻ
SDA
S
T
A ^Slave
R ^Address
T
Data(n)
Data(n+1)
Data(n+2)
S
Data(n+x)
T
O
P
S
P
A
A
A
A
C
C
C
C
K
K
K
K
Figure 48. CURRENT ADDRESS READ໋ྩ
(2)-3-2. ϥϯμϜŋϦʔυ
ϥϯμϜ·ϦʔυʹΑΓ೚ҙͷΞυϨεͷσʔλΛಡΈग़͢͜ͱ͕Ͱ͖·͢ɻϥϯμϜ·Ϧʔυ͸READ໋ྩͷ
εϨʔϒ·ΞυϨε(R/W bit = “1”)Λೖྗ͢ΔલʹɺμϛʔͷWRITE໋ྩΛೖྗ͢Δඞཁ͕͋Γ·͢ɻϥϯμ
Ϝ·ϦʔυͰ͸࠷ॳʹελʔτ·ίϯσΟγϣϯΛೖྗ͠ɺ࣍ʹWRITE໋ྩͷεϨʔϒ·ΞυϨε(R/W bit = “0”)ɺ
ಡΈग़͢ΞυϨεΛॱ࣍ೖྗ͠·͢ɻAK4589͕͜ͷΞυϨεೖྗʹରͯ͠ΞΫϊϦοδΛੜ੒ͨ͠ޙɺ࠶ͼ
ελʔτ·ίϯσΟγϣϯɺREAD໋ྩͷεϨʔϒ·ΞυϨε(R/W bit = “1”)Λೖྗ͠·͢ɻAK4589͸͜ͷεϨ
ʔϒ·ΞυϨεͷೖྗʹରͯ͠ΞΫϊϦοδΛੜ੒͠ɺࢦఆ͞ΕͨΞυϨεͷσʔλΛग़ྗ͠ɺ಺෦ΞυϨε
Χ΢ϯλʔΛ1ͭΠϯΫϦϝϯτ͠·͢ɻσʔλ͕ग़ྗ͞ΕͨޙɺϚελ͕ΞΫϊϦοδΛੜ੒ͤͣɺετο
ϓ·ίϯσΟγϣϯΛૹΔͱɺREADಈ࡞͸ऴྃ͠·͢ɻ
SDA
S
T
A ^Slave
R ^Address
T
Word
Address(n)
S
T
A ^Slave
R ^Address
T
Data(n)
Data(n+1)
S
S
A
A
C
C
K
K
A
A
A
C
C
C
K
K
K
Figure 49. RANDOM READ ໋ྩ
S
Data(n+x) ^T
O
P
P
MS0339-J-00
- 71 -
2004/09