AK4356VQ 데이터 시트보기 (PDF) - Asahi Kasei Microdevices

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AK4356VQ

192kHz 24Bit Six-Channel DAC for DVD-Audio

Asahi Kasei Microdevices 

ASAHI KASEI

[AK4356]

n Reset Function

When RSTN=0, all DACs are powered down but the internal register values are not initialized. The analog outputs go to

VCOM voltage and DZF pins of all channels go to “H”. Figure 7 shows the sequence of reset by RSTN bit.

RSTN bit

Internal

RSTN bit

2~3/fs (6)

Internal

State

D/A In

(Digital)

D/A Out

(Analog)

Clock In

MCLK,LRCK,BICK

DZFL/DZFR

Normal Operation

(1)

GD

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 VCOM voltage.

(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 4~5/fs after RSTN bit becomes “1”.

(6) There is a delay, 2~3/fs from RSTN bit “1” to the internal RSTN “1”.

Figure 7. Reset sequence example

M0072-E-01

- 19 -

1999/09

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