CS8416-IS Cirrus Logic, CS8416-IS Datasheet - Page 14

• Manufacturer Part Number: CS8416-IS
• Description: 192 kHZ DIGITAL AUDIO INTERFACE RECEIVER
• Manufacturer: Cirrus Logic

If the user reads OSLIP as soon as the event trig-
gers, over a long period of time the rate of occur-
ring INT will be equal to the difference in
frequency between the input AES data and the
slave serial output LRCK. The CS8416 uses a hys-
teresis window when a slip/repeat event occurs.
The slip/repeat is triggered when an edge of OL-
RCK passes a window size from the beginning of
the Z/X preamble. Without the hysteresis window,
jitter on OLRCK with a frequency very close to Fs
could slip back and forth, causing multiple slip/re-
peat events. The CS8416 uses a hysteresis window
to ensure that only one slip/repeat happens even
with jitter on OLRCK.
4.2
When OLRCK is configured as a master, the posi-
tive or negative edge of OLRCK (depending on the
setting of SOLRPOL in register 05h) will be within
-1.0%(1/Fs) to 1.1%(1/Fs) from the start of the pre-
amble X/Z. In master mode, the latency through the
part is dependent on the input sample frequency.
The delay through the part from the beginning of
the preamble to the active edge of OLRCK for the
various sample frequencies is given in
14
AES11 Behavior
X
Channel A
Data
Frame 191
Y
Channel B
Data
Z
Table
Figure 7. AES3 Data Format
Channel A
OLRCK (in slave mode)
Data
1. In
Frame 0
Preambles
Y
master mode without the de-emphasis filter en-
gaged, the latency of the audio data will be 3
frames.
When OLRCK is configured as a slave any syn-
chronized input within +/-28%(1/Fs) from the pos-
itive or negative edge of OLRCK (depending on
the setting of SOLRPOL in register 05h) will be
treated as being sampled at the same time. Since the
CS8416 has no control of the OLRCK in slave
mode, the latency of the data through the part will
be a multiple of 1/Fs plus the delay between OL-
RCK and the preambles.
Both of these conditions are within the tolerance
range set forth in the AES11 standard.
Channel B
Data
Table 1. Delays by Frequency Values
X
Fs (kHz)
Channel A
44.1
192
32
48
64
96
Data
Frame 1
Y
Delay (ns)
Channel B
96.6
78.6
74.6
60.6
50.6
TBD
Data
CS8416
DS578PP2