ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 111

• Manufacturer Part Number: ak4648
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

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MS0625-E-01
(Addr:00H, D7&D4)
PMSPL/R bits
Mono signal output from Speaker-Amp
(Addr:21H, D6)
(Addr:00H, D5)
(Addr:02H, D5)
(Addr:02H, D6)
(Addr:02H, D7)
<Example>
SPKMN bit
SPPSN bit
PMMIN bit
SPRP pin
SPRN pin
SPLP pin
SPLN pin
DACS bit
MINS bit
CLOCK
(1) Set up speaker output mode
(2) Power Up MIN-Amp and Speaker-Amp:
(3) Disable the path of “DAC
(4) Exit the power-save-mode of Speaker-Amp: SPPSN bit = “0” → “1”
(5) Enter the power-save-mode of Speaker-Amp: SPPSN bit = “1” → “0”
(6) Power Down MIN-Amp and Speaker-Amp: PMMIN = PMSPK bits = “1” → “0”
(7) Disable the path of “MIN
The clocks can be stopped when only MIN-Amp and Speaker-Amp are operating.
Enable the path of “MIN
a.
b. Stereo SPK Mode: SPKMN bit = “1”
a.
b. Stereo SPK Mode or High Power Mono SPK Mode: PMMIN = PMSPL = PMSPR bits = “0” → “1”
Mono SPK Mode & High Power Mono SPK Mode: SPKMN bit = “0”
Mono SPK Mode (When Lch Speaker-Amp, SPLP/SPLN pins are used.): PMMIN = PMSPL bits = “0”
→ “1”
X
0
Hi-Z
Hi-Z
Figure 78. “MIN-Amp
(1)
(2)
HVDD/2
SPK-Amp”: MINS bit = “0” → “1”
SPK-Amp”: MINS bit = “1” → “0”
(3)
SPK-Amp”: DACS bit = “0”
Clocks can be stopped.
(4)
Normal Output
Normal Output
0
X
- 111 -
Speaker-Amp” Output Sequence
(5)
HVDD/2
Hi-Z
(6)
(7)
Hi-Z
Example:
(1) Addr:21H, Data:40H
(2) Addr:00H, Data:E0H
(4) Addr:02H, Data:E0H
(3) Addr:02H, Data:60H
(6) Addr:00H, Data:40H
Stereo SPK Mode
(5) Addr:02H, Data:60H
(7) Addr:02H, Data:00H
Mono Signal Output
[AK4648]
2007/06