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CS8413 CS8414
DS240F1
5
SWITCHING CHARACTERISTICS - SERIAL PORTS
(TA = 25 °C; VD+, VA+ = 5V ± 5%; Inputs: Logic 0 = DGND, Logic 1 = VD+; CL = 20 pF)
Notes: 6. The output word rate, OWR, refers to the frequency at which an audio sample is output from the part.
(A stereo pair is two audio samples.) Therefore, in Master mode, there are always 32 SCK periods in
one audio sample. In Slave mode, exactly 32 SCK periods per audio sample must be provided in most
serial port formats. Therefor, if SCK is 128 x Fs, then SCK must be gated to provide exactly 32 periods
per audio sample.
7. In Master mode, SCK and FSYNC are outputs. In Slave mode, they are inputs. In the CS8413, control
reg. 2 bit 1, MSTR, selects master. In the CS8414, formats 1, 3 and 9 are slaves.
8. The table above assumes data is output on the falling edge and latched on the rising edge. With the
CS8413 the edge is selectable. The table is defined for the CS8413 with control reg. 2 bit 0, SCED, set
to one, and for the CS8414 in formats 2, 3, 5, 6 and 7. For the other formats, the table and figure edges
must be reversed (i.e. “rising” to “falling” and vice versa.)
Parameters
Symbol
Min
Typ
Max
Units
SCK Frequency
Master Mode
Slave Mode
fsck
-
OWRx32
-
128 x FS
Hz
SCK falling to FSYNC delay Master Mode
tsfdm
-20
-
20
ns
SCK Pulse Width Low
Slave Mode
tsckl
40
-
ns
SCK Pulse Width High
Slave Mode
tsckh
40
-
ns
SCK rising to FSYNC edge delay Slave Mode (Notes
7 and
8)tsfds
20
-
ns
FSYNC edge to SCK rising setup Slave Mode (Notes
7 and
8)tfss
20
-
ns
SCK falling (rising) to SDATA valid
tssv
-
20
ns
C, U, CBL valid to FSYNC edge CS8414
tcuvf
-1/fsck
-s
MCK to FSYNC edge delay
FSYNC from RXN/RXP
tmfd
-15
-
ns
sfds
t
ssv
t
SDATA
SCK
FSYNC
fss
t
MSB
sckh
t
ssv
t
sckl
t
SDATA
SCK
FSYNC
MSB
(Mode 1)
(Mode 3)
sfdm
t
ssv
t
cuvf
t
SDATA
SCK
FSYNC
C, U
Serial Output Timing - Slave Mode
Serial Output Timing -
Master Mode & C, U Port
FSYNC Generated From
Received Data
FSYNC
mfd
t
MCK
fss
t
sfds
t
sckh
t
sckl
t
SCK
(Modes 2,3,5,6,
7,10,12, and 13)
(Modes 0,1,4,
8,9, and 11)