AK4631 Datasheet, PDF (35/69 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

ASAHI KASEI
[AK4631]
„ ग़ྗϘϦϡʔϜ
AK4631͸MUTEΛؚΉ0.5dBεςοϓɺ256ϨϕϧͷσΟδλϧग़ྗϘϦϡʔϜΛ಺ଂ͠·͢ɻ͜ͷϘϦϡʔ
Ϝ͸DACͷલஈʹ͋ΓɺೖྗσʔλΛ+12dB͔Β−115dBݮͰ·ਰɺ·ͨ͸ϛϡʔτ͠·͢ɻϘϦϡʔϜؒͷ
ભҠ͸1061/fs·ͨ͸256/fsͰιϑτભҠ͠·͢ɻભҠεςοϓ͸ DVTM bit Ͱઃఆ͠·͢ɻ


DVOL7-0
Gain
00H
01H
02H
•
18H
•
FDH
FEH
FFH
+12.0dB
+11.5dB
+11.0dB
•
0dB
•
−114.5dB
−115.0dB
MUTE (−∞)
Default
Table 16. Digital Volume Code Table
DVTM bit
0
1
DVOL7-0 bits 00H ͔Β FFH ·ͰͷભҠ࣌ؒ
ઃఆ஋
fs=8kHz࣌
fs=22.05kHz࣌
1061/fs
256/fs
133msec
32msec
48msec
12msec
Table 17.ग़ྗϘϦϡʔϜͷભҠ࣌ؒઃఆ
„ BEEPೖྗ


PMBP bit = “1”ͷ࣌ɺBEEPS bitΛ“1”ʹ͢ΔͱBEEP pin͔Βೖྗ͞Εͨ৴߸ΛεϐʔΧΞϯϓ͔Βग़ྗ͠ɺ
BEEPA bitΛ “1”ʹ͢ΔͱϞϊϥϧϥΠϯΞ΢τΞϯϓ͔Βग़ྗ͢Δ͜ͱ͕Ͱ͖·͢ɻೖྗ͞ΕΔBEEPԻ͸
R_iͰϨϕϧௐ੔Λߦ͏͜ͱ͕Ͱ͖·͢ɻR_i = 20kΩ ࣌ͷήΠϯΛ Table 18 ʹࣔ͠·͢ɻ͜ͷήΠϯ͸ɺR_i ͷ
஋ʹ൒ൺྫ͠·͢ɻ

BEEP
Rf
Ri
-
+
Figure 31. Block Diagram of BEEP pin
SPKG1-0 bits
00
01
10
11
BEEP Æ SPP/SPN ήΠϯ BEEP Æ AOUT ήΠϯ
+7.89dB
0dB
+9.93dB
0dB
+14.11dB
0dB
+16.15dB
0dB
Table 18. R_i = 20kΩ ࣌ɺBEEPೖྗήΠϯ
MS0317-J-01
- 35 -
2004/11