ak4560a AKM Semiconductor, Inc., ak4560a Datasheet - Page 36

• Manufacturer Part Number: ak4560a
• Description: 16bit Codec With Alc And Mic/hp/spk-amps
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
n SPEAKER BLOCK
The output signal from analog volume is converted into a monaural signal, its signal is input to speaker-Amp via ALC2
circuit. This speaker-Amp is a monaural output by BTL, can be output to maximum 80mW at 8 . (Refer to Figure 26)
Speaker Blocks (MOUT, ALC2 and Speaker-Amp) can be powered ON/OFF by controlling SPKP bit.
When SPKP bit is “0”, MOUT, SP0 and SP1 pins go Hi-z. (Refer to Figure 28)
When SPPS bit is “0”, Speaker-Amp becomes Power-Save-Mode. (Refer to Figure 27)
Then SP0 pin goes Hi-z and SP1 pin is output to SVDD/2 via R1 (typ.100k ).
When PD pin changes from “L” to “H” after power-up, SP0 and SP1 pins become Power-Save-Mode. In Power-Save-
Mode, SP0 and SP1 pins gradually become HVCM voltage via an internal resistor (R1: typ.200k ) from Hi-z to decrease
a pop noise. And when Power OFF (SPKP = “0”), the pop noise can be decreased by controlling via Power-Save-Mode.
MS0028-E-00
Figure 27. Speaker-Amp Power-Save-Mode
Figure 26. Speaker-Amp Normal Operation
SPPS
SPPS
SPPS
SPPS
-
+
-
+
+
-
+
SPPS
-
SPPS
- 36 -
SPPS
SPPS
SPPS
SPPS
SPPS
SPPS
SPKP
SPKP
R1
R1
or
or
SPKP
SPKP
SP0
SP0
SP1
SP1
8
8
[AK4560A]
2000/05