AK4643 Datasheet, PDF (96/104 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/RCV/SPK-AMP

ASAHI KASEI
[AK4643]
„ Mono signal output from Speaker-Amp
CLOCK
PMMIN bit
(Addr:00H, D5)
PMSPK bit
(Addr:00H, D4)
DACS bit
(Addr:02H, D5)
MINS bit
(Addr:02H, D6)
SPPSN bit
(Addr:02H, D7)
SPP pin
SPN pin
Clocks can be stopped.
Example:
(1) Addr:00H, Data:70H
(1)
(5)
(2) Addr:02H, Data:60H
1
0
(2)
(6)
(3)
(4)
Hi-Z
Normal Output
Hi-Z
(3) Addr:02H, Data:E0H
Mono Signal Output
(4) Addr:02H, Data:60H
(5) Addr:00H, Data:40H
Hi-Z
HVDD/2 Normal Output HVDD/2 Hi-Z
(6) Addr:02H, Data:00H
Figure 85. “MIN-Amp Æ Speaker-Amp” Output Sequence
<Example>
The clocks can be stopped when only MIN-Amp and Speaker-Amp are operating.
(1) Power Up MIN-Amp and Speaker-Amp: PMMIN = PMSPK bits = “0” → “1”
(2) Disable the path of “DAC Æ SPK-Amp”: DACS bit = “0”
Enable the path of “MIN Æ SPK-Amp”: MINS bit = “0” → “1”
(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: PMMIN = PMSPK bits = “1” → “0”
(6) Disable the path of “MIN Æ SPK-Amp”: MINS bit = “1” → “0”
MS0476-E-01
- 96 -
2006/10