AK4355 Datasheet, PDF (16/24 Pages) Asahi Kasei Microsystems – 192kHz 24-Bit 6ch DAC for DVD-Audio

ASAHI KASEI
[AK4355]
n Reset Function
When RSTN=0, DAC is powered down but the internal register values are not initialized. The analog outputs go to AVDD/2
voltage and DZF pin goes to "H". Figure 7 shows the example of reset by RSTN bit.
RSTN bit
Internal
RSTN bit
Internal
State
D/A In
(Digital)
D/A Out
(Analog)
Clock In
MCLK,LRCK,BICK
DZF
Normal Operation
(1)
GD
3~4/fs (6)
2~3/fs (6)
Digital Block Power-down
Normal Operation
“0” data
(3) (2)
(3)
(4)
Don’t care
2/fs(5)
GD (1)
Notes:
(1) The analog output corresponding to digital input has the group delay (GD).
(2) Analog outputs go to AVDD/2.
(3) Click noise occurs at the edges(“↑ ↓”) of the internal timing of RSTN bit. This noise is output even if “0” data is
input.
(4) The external clocks (MCLK, BICK and LRCK) can be stopped in the reset mode (RSTN = “L”).
(5) DZF pins go to “H” when the RSTN bit becomes “0”, and go to “L” at 2/fs after RSTN bit becomes “1”.
(6) There is a delay, 3~4/fs from RSTNbit “0” to the internal RSTN bit “0”, and 2~3/fs from RSTN bit “1” to the internal
RSTN “1”.
Figure 7. Reset Sequence Example
MS0063-E-01
- 16 -
2002/07