ACS422A68TAGZBX8 IDT, ACS422A68TAGZBX8 Datasheet - Page 63

• 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.
SDI / SDO
SDI / SDO
5.3.
The ACS422x68 supports 3 common audio interface formats and programmable clocking that provides broad compat-
ibility with DSPs, Consumer Audio and Video SOCs, FPGAs, handset chipsets, and many other products.
In all modes, depending on word length, BCLK frequency and sample rate, there may be unused BCLK cycles before
each LRCLK transition. If the converter word length is smaller than the number of clocks per sample in the frame then
the DAC will ignore (truncate) the extra bits while the ADC will zero pad the output data. If the converter word length
chosen is larger than the number of clocks available per sample in the frame, the ADC data will be truncated to fit the
frame and the DAC data will be zero padded.
5.4.
In Left Justified mode, the MSB is available on the first rising edge of BCLK following a LRCLK transition. The other bits
are then transmitted in order. The LRCLK signal is high when left channel data is present and low when right channel
data is present.
LRCLK
5.5.
In Right Justified mode, the LSB is available on the last rising edge of BCLK before a LRCLK transition. All other bits
are transmitted in order. The LRCLK signal is high when left channel data is present and low when right channel data is
present.
LRCLK
BCLK
BCLK
Right Justified
Left Justified
Audio Data Formats
Left Justified Audio Interface
Right Justified Audio Interface (assuming n-bit word length)
Figure 27. Right Justified Audio Interface (assuming n-bit word length)
Figure 26. Left Justified Audio Interface (assuming n-bit word length)
MSB
1
2
3
Word Length (WL)
MSB
1
Left Channel
Left Channel
2
3
Word Length (WL)
n-2
n-1
LSB
n
n-2
n-1
63
LSB
n
1/fs
1/fs
MSB
1
2
3
MSB
1
Right Channel
Right Channel
2
3
n-2
n-1
LSB
n
n-2
n-1
LSB
n
ACS422X68
V1.6 01/13