AK4632 Datasheet, PDF (63/70 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Mono CODEC with ALC & MIC/SPK/Video-AMP

ASAHI KASEI
[AK4632]
„ BEEP signal output from Speaker-Amp
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 52. “BEPP-Amp Æ Speaker-Amp” Output Sequence
<Example>
The clocks can be stopped when only BEEP-Amp and Speaker-Amp are operating. However ALC2 must be
disabled.
(1) ALC2 Disable: ALC2 bit = “0”
(2) Power Up BEEP-Amp and Speaker-Amp: PMBP bit = PMSPK bit = “0” → “1”
(3) Disable the path of “ALC2 Æ SPK-Amp”: ALC2S bit = “0”
Enable the path of “BEEP Æ SPK-Amp”: BEEPS bit = “0” → “1”
(4) Exit the power-save-mode of Speaker-Amp: SPPS bit = “0” → “1”
“(4)” time depends on the time constant of external resistor and capacitor connected to BEEP pin. If
Speaker-Amp output is enabled before input of BEEP-Amp becomes stable, pop noise may occur.
e.g. R=20k, C=0.1µF: Recommended wait time is more than 5τ = 10ms.
(5) Enter the power-save-mode of Speaker-Amp: SPPS bit = “1” → “0”
(6) Power Down BEEP-Amp and Speaker-Amp: PMBP bit = PMSPK bit = “1” → “0”
(7) Disable the path of “BEEP Æ SPK-Amp”: BEEPS bit = “1” → “0”
MS0396-E-00
- 63 -
2005/06