ak4633 AKM Semiconductor, Inc., ak4633 Datasheet - Page 76

• Manufacturer Part Number: ak4633
• Description: 16-bit ?? Mono Codec With Alc & Mic/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
MS0447-E-03
BEEP signal output from Speaker-Amp
<Example>
(Addr:00H, D2)
(Addr:00H, D4)
(Addr:02H, D6)
(Addr:02H, D7)
PMSPK bit
SPPSN bit
BEEPS bit
PMBP bit
SPN pin
CLOCK
SPP pin
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
(3) Exit the power-save-mode of Speaker-Amp: SPPSN bit = “ 0 ” → “ 1 ”
(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
Speaker-Amp output is enabled before input of BEEP-Amp becomes stable, pop noise may occur.
“ (4) ” time depends on the time constant of external resistor and capacitor connected to BEEP pin. If
e.g. R=20k, C=0.1µF: Recommended wait time is more than 5τ = 10ms.
Hi-Z
Figure 55. “ BEEP-Amp
Hi-Z
(1)
SVDD/2
SPK-Amp ” : BEEPS bit = “ 0 ” → “ 1 ”
SPK-Amp ” : BEEPS bit = “ 1 ” → “ 0 ”
(2)
Clocks can be stopped.
(3)
Normal Output
Normal Output
- 76 -
Speaker-Amp ” Output Sequence
(4)
SVDD/2
Hi-Z
(5)
Hi-Z
(6)
Example:
(3) Addr:02H, Data:C0H
(2) Addr:02H, Data:40H
(1) Addr:00H, Data:70H
(4) Addr:02H, Data:40H
(5) Addr:00H, Data:40H
(6) Addr:02H, Data:00H
BEEP Signal Output
[AK4633]
2006/04