ak4370 AKM Semiconductor, Inc., ak4370 Datasheet - Page 39

• Manufacturer Part Number: ak4370
• Description: 24-bit 2ch Dac With Hp-amp & Output Mixer
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
■
MS0595-E-00
Addr
00H
Register Definitions
PMVCM: Power Management for VCOM Block
PMDAC: Power Management for DAC Blocks
PMHPL: Power Management for the left channel of the headphone-amp
PMHPR: Power Management for the right channel of the headphone-amp
MUTEN: Headphone Amp Mute Control
PMLO: Power Management for Stereo Output
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”.
Register Name
Power Management 0
Default
0: Power OFF (Default)
1: Power ON
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).
0: Power OFF (Default). HPL pin goes to VSS1(0V).
1: Power ON
0: Power OFF (Default). HPR pin goes to VSS1(0V).
1: Power ON
0: Mute (Default). HPL and HPR pins go to VSS1(0V).
1: Normal operation. HPL and HPR pins go to 0.475 x AVDD.
0: Power OFF (Default) LOUT/ROUT pins go to Hi-Z.
1: Power ON
R/W
RD
D7
0
0
RD
D6
0
0
PMLO
R/W
D5
- 39 -
0
MUTEN
R/W
D4
0
PMHPR
R/W
D3
0
PMHPL
R/W
D2
0
PMDAC
R/W
D1
0
[AK4370]
PMVCM
2007/03
R/W
D0
0