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[AK4675]
MS0963-E-00
2008/05
- 142 -
ミ
Register Definitions (CODEC & SRC Blocks)
Addr
Register
Name
D7 D6 D5 D4 D3 D2 D1 D0
00H
AD/DA Power Management PMDAR
PMDAL
PMADR
PMADL
PMMICR
PMMICL
PMMP
PMVCM
R/W R/W
R/W
R/W
R/W R/W R/W R/W R/W
Default
0 0 0 0 0 0 0 0
PMVCM: VCOM Power Management
0: Power down (default)
1:
Power
up
When any blocks are powered-up, the PMVCM bit must be set to “1”. PMVCM bit can be set to “0” only
when all power management bits are “0”.
PMMP: MPWR pin Power Management
0: Power down: Hi-Z (default)
1: Power up
PMMICL: MIC-Amp Lch Power Management
0: Power down (default)
1:
Power
up
PMMICR: MIC-Amp Rch Power Management
0: Power down (default)
1:
Power
up
PMADL: ADC Lch Power Management
0: Power down (default)
1:
Power
up
When the PMADL or PMADR bit is changed from “0” to “1”, the initialization cycle (1059/fs=24ms
@44.1kHz) starts. After initializing, digital data of the ADC is output.
PMADR: ADC Rch Power Management
0: Power down (default)
1:
Power
up
PMDAL: DAC Lch Power Management
0: Power down (default)
1:
Power
up
PMDAR: DAC Rch Power Management
0: Power down (default)
1:
Power
up
Each block can be powered-down respectively by writing “0” in each bit of this address. When the PDN pin is “L”, all
blocks of CODEC & SRC are powered-down regardless of setting of this address. In this case, register of CODEC &
SRC is initialized to the default value.
When all power management bits are “0”, all blocks of CODEC & SRC are powered-down. The register values of
CODEC & SRC remain unchanged. Power supply current is 20
μ
A(typ) in this case. For fully shut down (typ. 1
μ
A),
PDN pin should be “L”.
When neither ADC nor DAC are used, external clocks may not be present. When ADC or DAC is used, external clocks
must always be present.