AK4633 Datasheet, PDF (76/82 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

ASAHI KASEI
„ BEEP signal output from Speaker-Amp
[AK4633]
CLOCK
PMBP bit
(Addr:00H, D2)
PMSPK bit
(Addr:00H, D4)
BEEPS bit
(Addr:02H, D6)
SPPSN bit
(Addr:02H, D7)
SPP pin
SPN pin
Clocks can be stopped.
Example:
(1) Addr:00H, Data:70H
(1)
(2)
(3)
(5)
(6)
(2) Addr:02H, Data:40H
(3) Addr:02H, Data:C0H
BEEP Signal Output
Hi-Z
(4)
Normal Output
Hi-Z
(4) Addr:02H, Data:40H
(5) Addr:00H, Data:40H
Hi-Z
SVDD/2 Normal Output SVDD/2 Hi-Z
(6) Addr:02H, Data:00H
Figure 55. “BEEP-Amp Æ Speaker-Amp” Output Sequence
<Example>
The clock is not needed to supply when only BEEP-Amp and Speaker-Amp are operating.
(1) Power Up BEEP-Amp and Speaker-Amp: PMBP bit = PMSPK bit = “0” → “1”
(2) Enable the path of “BEEP Æ SPK-Amp”: BEEPS bit = “0” → “1”
(3) Exit the power-save-mode of Speaker-Amp: SPPSN 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.
(4) Enter the power-save-mode of Speaker-Amp: SPPSN bit = “1” → “0”
(5) Power Down BEEP-Amp and Speaker-Amp: PMBP bit = PMSPK bit = “1” → “0”
(6) Disable the path of “BEEP Æ SPK-Amp”: BEEPS bit = “1” → “0”
MS0447-E-03
- 76 -
2006/04