ak4124vf AKM Semiconductor, Inc., ak4124vf Datasheet - Page 16

• Manufacturer Part Number: ak4124vf
• Description: 192khz/ 24bit High Performance Asynchronous Src
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
T Dither
The AK4124 has the dither circuit. The dither circuit adds the dither to the LSB of the output data set with the OBIT1-0
pins by DITHER pin = “H" regardless of the SRC mode or the SRC bypass mode.
T System Reset
Bringing the PDN pin = “L” sets the AK4124 power-down mode and initializes the digital filter. The AK4124 should be
reset once by bringing PDN pin = “L” upon power-up. When PDN pin = “L”, the SDTO output is “L”. The SDTO valid
time is 100ms. Until then, the SDTO outputs “L”.
MS0288-E-01
Case 1
Case 2
External clocks
(Internal state)
External clocks
External clocks
(Internal state)
External clocks
SDTI
SDTI
SDTO
SDTO
PDN
UNLOCK
PDN
UNLOCK
(Input port)
(Input port)
(Output port)
(Output port)
Power-down
Power-down
Don’t care
Don’t care
Don’t care
“0” data
fs detection
PLL lock &
< 100ms
(No Clock)
(Don’t care)
(Don’t care)
Output Clocks 1
Figure 12. System Reset 2
Input Clocks 1
Figure 11. System Reset
Input Data 1
“0” data
PLL Unlock
Normal data
Normal
operation
- 16 -
PD
“0” data
PLL lock &
PLL lock &
fs detection
< 100ms
fs detection
< 100ms
Output Clocks 2
Input Clocks 2
Input Data 2
Output Clocks
Input Clocks
Input Data
Normal data
Normal data
Normal
Normal
operation
operation
Power-down
Don’t care
Don’t care
Don’t care
Power-down
Don’t care
Don’t care
Don’t care
“0” data
“0” data
[AK4124]
2004/08