ak4646 AKM Semiconductor, Inc., ak4646 Datasheet - Page 73

• Manufacturer Part Number: ak4646
• Description: Stereo Codec With Mic/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

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MS0557-E-02
Mono signal output from Speaker-Amp
(Addr:00H, D5)
(Addr:00H, D4)
(Addr:02H, D5)
(Addr:02H, D6)
(Addr:02H, D7)
<Example>
PMSPK bit
SPPSN bit
BEEPS bit
PMBP bit
DACS bit
SPN pin
SPP pin
CLOCK
The clocks can be stopped when only MIN-Amp and Speaker-Amp are operating.
(1) Power Up MIN-Amp and Speaker-Amp: PMBP = PMSPK bits = “0” → “1”
(2) Disable the path of “DAC
(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 MIN-Amp and Speaker-Amp: PMBP = PMSPK bits = “1” → “0”
(6) Disable the path of “MIN
Speaker-Amp output is enabled before input of MIN-Amp becomes stable, pop noise may occur.
Enable the path of “MIN
“ (3) ” time depends on the time constant of external resistor and capacitor connected to MIN pin. If
e.g. R=20k, C=0.1 μ F: Recommended wait time is more than 5 τ = 10ms.
" 0" or " 1"
Hi-Z
Hi-Z
Figure 44. “MIN-Amp
(1)
SVDD/2
SPK-Amp”: BEEPS bit = “0” → “1”
SPK-Amp”: BEEPS bit = “1” → “0”
(2)
SPK-Amp”: DACS bit = “0”
Clocks can be stopped.
(3)
Normal Output
Normal Output
0
Speaker-Amp” Output Sequence
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(4)
SVDD/2
Hi-Z
(5)
(6)
Hi-Z
Example:
(1) Addr:00H, Data:70H
(3) Addr:02H, Data:E0H
(2) Addr:02H, Data:60H
(5) Addr:00H, Data:40H
(4) Addr:02H, Data:60H
(6) Addr:02H, Data:00H
Mono Signal Output
[AK4646]
2007/05