ASAHI KASEI
[AK4370]
■ Register Definitions
D7
0
D6
0
D5
PMLO
R/W
0
D4
D3
D2
D1
D0
Addr Register Name
00H Power Management 0
R/W
MUTEN PMHPR PMHPL PMDAC PMVCM
RD
0
RD
0
R/W
0
R/W
0
R/W
0
R/W
0
R/W
0
Default
PMVCM: Power Management for VCOM Block
0: Power OFF (Default)
1: Power ON
PMDAC: Power Management for DAC Blocks
0: Power OFF (Default)
1: Power ON
When the PMDAC bit is changed from “0” to “1”, the DAC is powered-up to the current register values
(ATT value, sampling rate, etc).
PMHPL: Power Management for the left channel of the headphone-amp
0: Power OFF (Default). HPL pin goes to VSS1(0V).
1: Power ON
PMHPR: Power Management for the right channel of the headphone-amp
0: Power OFF (Default). HPR pin goes to VSS1(0V).
1: Power ON
MUTEN: Headphone Amp Mute Control
0: Mute (Default). HPL and HPR pins go to VSS1(0V).
1: Normal operation. HPL and HPR pins go to 0.475 x AVDD.
PMLO: Power Management for Stereo Output
0: Power OFF (Default) LOUT/ROUT pins go to Hi-Z.
1: Power ON
Each block can be powered-down respectively by writing “0” in each bit of this address. When the PDN pin is “L”,
all blocks are powered-down regardless as setting of this address. In this case, register is initialized to the default
value.
When PMVCM, PMDAC, PMHPL, PMHPR and PMLO bits are “0”, all blocks are powered-down. The register
values remain unchanged. Power supply current is 20μA(typ) in this case. For fully shut down (typ. 1μA), PDN pin
should be “L”.
MS0595-E-00
2007/03
- 39 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
