ak4620b AKM Semiconductor, Inc., ak4620b Datasheet - Page 27

• Manufacturer Part Number: ak4620b
• Description: 24-bit 192khz Audio Codec With Ipga
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
In parallel mode, both ADC and DAC are powered up with releasing internal reset state when PDN pin is set to “H”.
When PDN pin is “L”, IATT is set to “00H (Mute)”. After exiting power down mode, IATTs fade in to “80H (0dB)”. At
that time, ADC s output “0” during first 516/fs cycles. DAC does not have the initialization cycle and the operation of
fade-in.
MS0401-E-00
Power Supply
PDN pin
ADC Internal State
IATT
SDTO
DAC Internal State
AOUT
External Mute
Example
External clocks
• INITA:
• PD:
• FI:
• AOUT:
Initializing period of ADC analog section (516/fs).
Power down state.
Fade in. After exiting power down and reset state, ATT value fades in.
Some pop noise may occur at “*”.
Figure 12. Reset & Power Down Sequence in parallel mode
Hi-Z
00H
PD
PD
*
00H 80H
INITA
“0”
FI
The clocks can be stopped.
MCLK, LRCK, BICK
Output
Output
Normal
Normal
- 27 -
80H
*
Hi-Z
00H
PD
PD
“0”
*
INITA
00H 80H
MCLK, LRCK, BICK
FI
Output
Normal
Normal
Output
80H
[AK4620B]
2005/07