ACS422A68TAGZBX8 IDT, ACS422A68TAGZBX8 Datasheet - Page 32

• Manufacturer Part Number: ACS422A68TAGZBX8
• Description: Interface - CODECs
• Manufacturer: IDT

Specifications of ACS422A68TAGZBX8

• Rohs: yes
• Part # Aliases: IDTACS422A68TAGZBX8

ACS422x68
LOW-POWER, HIGH-FIDELITY, INTEGRATED CODEC
©2011 INTEGRATED DEVICE TECHNOLOGY, INC.
3.12. Mute and De-Emphasis
The ACS422x68 has a Soft Mute function, which is used to gradually attenuate the digital signal volume to zero. The
gain returns to its previous setting if the soft mute is removed. At startup, the codec is muted by default; to enable audio
play, the mute bit must be cleared to 0.
After the equalization filters, de-emphasis may be performed on the audio data to compensate for pre-emphasis that
may be included in the audio stream. De-emphasis filtering is only available for 48kHz, 44.1kHz, and 32kHz sample
rates.
3.13. Mono Operation and Phase Inversion
Normal stereo operation converts left and right channel digital audio data to analog in separate DACs. However, it is
also possible to have the same signal (left or right) appear on both analog output channels by disabling one channel;
alternately, there is a mono-mix mode that mixes the two channels digitally before converting to analog using only one
DAC. In this mode, the other DAC is switched off, and the resulting mixed stream signal can appear on both analog
output channels. The DAC output defaults to non-inverted. Setting DACPOLL and DACPOLR bits will invert the DAC
output phase on the left and right channels.
R24 (18h)
CNVRTR1
Register Address
3.13.1. DAC Control Register
Bit
5:4
1:0
7
6
3
2
DMONOMIX
DACPOLR
DACPOLL
DACMU
DEEMP
RSVD
Label
[1:0]
Table 36. CNVRTR1 Register
Type
RW
RW
RW
RW
RW
R
Default
32
00
00
0
0
1
0
Invert DAC Right signal
Invert DAC Left signal
DAC mono mix
00: stereo
01: mono ((L/2)+(R/2)) into DACL, ‘0’ into DACR
10: mono ((L/2)+(R/2)) into DACR, ‘0’ into DACL
11: mono ((L/2)+(R/2)) into DACL and DACR
Digital Soft Mute
1 = mute
0 = no mute (signal active)
De-emphasis Enable
1 = De-emphasis Enabled
0 = No De-emphasis
Reserved
Description
ACS422X68
V1.6 01/13