AK4213 Datasheet, PDF (26/38 Pages) Asahi Kasei Microsystems – Mono Class-D SPK-Amp with Stereo Cap-less HP-Amp

[AK4213]
3) Change of the signal path to HP-Amp or SPK-Amp
Example: The signal path changes from LIN1/RIN1 to LIN2/RIN2 when HP-Amp is powered-up.
HPLL1/R1 bits
PMV1 bit
(1)
(2)
≥ 0s
LIN1/RIN1 Volume
Output State
Output
HPLL2/R2 bits
≥ 0s
VCOM
(5)
PMV2 bit
LIN2/RIN2 Volume
Output State
(3)
(4)
Hi-Z
Hi-Z
Output
Figure 19. Example of changing signal path during HP-Amp is powered-up
(1) Signal path OFF from LIN1/RIN1 to HP-Amp: HPLL1 = HPLR1 bits = “1” Æ “0”
(2) Input volume of LIN1/RIN1 is powered-down: PMV1 bit = “1” Æ “0”
(3) Input volume of LIN2/RIN2 is powered-up: PMV2 bit = “0” Æ “1”
(4) Input volume of LIN2/RIN2 is powered-up at 26.3ms (max.).
(5) Signal path ON from LIN2/RIN2 to HP-Amp: HPLL2 = HPLR2 bits = “0” Æ “1”
MS0949-E-01
- 26 -
2008/07