CS8403A-CS CIRRUS [Cirrus Logic], CS8403A-CS Datasheet - Page 5

• Manufacturer Part Number: CS8403A-CS
• Description: 96KHZ DIGITAL AUDIO TRANSMITTER
• Manufacturer: CIRRUS [Cirrus Logic]

SWITCHING CHARACTERISTICS - SERIAL PORTS
(T
Notes: 5. The input word rate (IWR) refers to the frequency at which stereo audio input sample pairs are input to
DS239PP1
Input Word Rate
SCK Frequency
SCK Pulse Width Low
SCK Pulse Width High
SCK rising to FSYNC edge delay
SCK rising to FSYNC edge setup
SDATA valid to SCK rising setup
SCK rising to SDATA hold time
C, U, V valid to SCK rising setup
SCK rising to C, U, V hold time
U valid to SBC rising setup
SBC rising to U hold time
RST Pulse Width
A
= 25 °C; VD+ = 5V; Inputs: Logic0 = GND, Logic1 = VD+; C
6. Master mode is defined as SCK and FSYNC being outputs. In Slave mode they are inputs. In the
7. The table above assumes data is output on the falling edge and latched on the rising edge. In both parts
8. The diagrams show SBC rising coincident with the first rising edge of SCK after FSYNC transitions.
the part. (A stereo pair is two audio samples.) Therefore, in Master mode, there are always 32 SCK
periods in one audio sample.
CS8403A, control register 3 bit 1, MSTR, selects master. In the CS8404A, only format 0 is master.
the edge is selectable. The table is defined for the CS8403A with control register 3 bit 0, SCED, set to
one, and for the CS8404A in formats 4 through 7. For the other formats, the table and figure edges must
be reversed (i.e. “rising” to “falling” and vice versa).
This is true for all modes except FSF0 & 1 both equal 1 in the CS8403A, and format 4 in the CS8404A.
In these modes SBC is delayed one full SCK period.
Parameters
FSYNC
SDATA
SCK
Slave Mode
Slave Mode
non-CD Mode Notes 7, 8
non-CD Mode Notes 7, 8
CS8404A, CD mode
CS8404A, CD mode
CS8404A
Master Mode
Slave Mode
CS8404A
CS8404A
Serial Input Timing - Slave Mode
t
sfds
t
sss
Notes 6, 7
Notes 6, 7
Note 5
Note 6
Note 6
Note 6
Note 6
Note 7
Note 7
Note 8
Note 8
t
sfs
Symbol
L
t
t
ssh
sckl
IWR
t
= 20 pF)
t
t
t
t
t
t
t
t
t
sckh
t
sckf
sckl
sfds
suh
sss
ssh
css
scs
uss
sfs
t
sckh
Min
150
25
25
20
20
20
20
50
80
0
0
-
-
-
CS8403A CS8404A
IWR x 64
Typ
-
-
-
-
-
-
-
-
-
-
-
-
Max
12.5
108
-
-
-
-
-
-
-
-
-
-
-
-
Units
MHz
kHz
Hz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
5