AK4631 Datasheet, PDF (63/69 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

ASAHI KASEI
[AK4631]
„ εϐʔΧ͔ΒͷBEEP৴߸ग़ྗ

CLOCK
Clocks can be stopped.
Example:
ALC2 bit
(Addr:07H, D6)
PMBP bit
(Addr:00H, D2)
PMSPK bit
(Addr:00H, D4)
ALC2S bit
(Addr:02H, D5)
BEEPS bit
(Addr:02H, D6)
SPPS bit
(Addr:02H, D7)
SPP pin
SPN pin
0 or 1
0
(1)
(2)
(1) Addr:07H, Data:00H
(2) Addr:00H, Data:70H
(6)
(3) Addr:02H, Data:60H
0 or 1
0
(3)
(4)
(4) Addr:02H, Data:E0H
(7)
BEEP Signal Output
(5) Addr:02H, Data:60H
(5)
Hi-Z
Normal Output
Hi-Z
(6) Addr:00H, Data:40H
Hi-Z
SVDD/2 Normal Output SVDD/2 Hi-Z
(7) Addr:02H, Data:00H
Figure 49. “BEPP-Amp Æ Speaker-Amp” Output Sequence
<खॱྫ>
“BEEP-Amp → SPK-Amp”ͷΈͷಈ࡞Ͱ͸ɺΫϩοΫ͸͞څڙΕ͍ͯΔඞཁ͸͋Γ·ͤΜɻͨͩ͠ɺALC2͸
Disableʹͯ͠Լ͍͞ɻ
(1) ALC2 Disable: ALC2 bit = “0”
(2) BEEP-AmpͼٴεϐʔΧͷύϫʔΞοϓɿ PMBP bit = PMSPK bit = “0” → “1”
(3) ALC2 Æ SPK-AmpͷύεͷDisable: ALC2S bit = “0”
BEEP Æ SPK-AmpͷύεͷEnable: BEEPS bit = “0” → “1”
(4) εϐʔΧͷύϫʔηʔϒϞʔυͷղআ : SPPS bit = “0” → “1”
(4)ͷ۠ؒ͸BEEP pinʹ઀ଓ͞Ε͍ͯΔίϯσϯαͱ఍߅ͷ࣌ఆ਺ʹΑͬͯઃఆ͍ͯͩ͘͠͞ɻBEEP-Amp
ͷೖྗ͕҆ఆ͢ΔલʹSPK-Ampͷग़ྗΛEnableʹ͢ΔͱɺϙοϓԻ͕ੜ͡ΔՄೳੑ͕͋Γ·͢ɻ
e.g. R=20kΩ, C=0.1µFͷ৔߹: ਪ঑଴ͪ࣌ؒ 5τ = 10ms Ҏ্
(5) εϐʔΧͷύϫʔηʔϒϞʔυ΁Ҡߦ : SPPS bit = “1” → “0”
(6) BEEP-AmpͼٴεϐʔΧͷύϫʔμ΢ϯ : PMBP bit = PMSPK bit = “1” → “0”
(7) BEEP Æ SPK-AmpͷύεͷDisable: BEEPS bit = “1” → “0”
MS0317-J-01
- 63 -
2004/11