AK2300 Datasheet, PDF (16/19 Pages) Asahi Kasei Microsystems – 3.3V Single channel PCM CODEC LSI

MUTE
The output of the PCM CODEC can be muted by pin control.
MUTEN pin
MUTEN pin
L
H
Operation
Mute
Normal
DX pin
0 Code
PCM data output
[AK2300]
VR pin
VREF level(1.3V)
CODEC analog output
[DX pin]
When the MUTEN pin turns to “L” during the data output, the mute function becomes available at the top of
the next FS.
[VR pin]
When the MUTEN pin turns to “L”, 0 code is fed to the D/A converter and VR becomes at analog reference
level (VREF level=1.3V).
POWER DOWN MODE
PDN pin “L” or to hold the BCLK pin “L”, the AK2300 is powered down.
(*Please don’t stop BCLK at “H” level.)
Power up/down sequence
1) Power down
60usec(typ) passed after the PDN pin turns “L” or the BCLK pin hold “L”, internal PDN signal turn to L and the
AK2300 is powered down.
When power down mode the output pins are as follows.
PIN Name
GST
VR
DX
VREF
PLLC
Output state
Hi-Z
Hi-Z
VSS
VSS
VSS
2) Power up
FS and BCLK pins are clocked and PDN pin =”H”, internal PDN signal is turn to “H” and power down mode is
released.
During power down mode and 20msec (typ) after the power up, the voice path is muted for not to output
abnormal noise.
BCLK
Power down Power up
BCLK stop
60usec
BCLK input
MUTE
release
BCLK
Power down Power up
MUTE
release
PDN
PDN
Internal PD
signal
Internal
MUTE signal
20msec
Internal PD
signal
Internal
MUTE signal
20msec
Power Down by BCLK=”L”
Power Down by PDN=”L”
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