CS8413 CS8414

DS240F1

5

SWITCHING CHARACTERISTICS - SERIAL PORTS

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

(Notes 6 and 7)

Slave Mode

(Note 7)

-

OWRx32

OWRx32

-

-

Hz

Hz

SCK falling to FSYNC delay Master Mode

(Notes 7 and 8)

-20

-

20

ns

SCK Pulse Width Low

Slave Mode

(Note 7)

40

-

-

ns

SCK Pulse Width High

Slave Mode

(Note 7)

40

-

-

ns

SCK rising to FSYNC edge delay Slave Mode (Notes 7 and 8)

20

-

-

ns

FSYNC edge to SCK rising setup Slave Mode (Notes 7 and 8)

20

-

-

ns

SCK falling (rising) to SDATA valid

(Note 8)

-

-

20

ns

C, U, CBL valid to FSYNC edge CS8414

(Note 8)

-s

MCK to FSYNC edge delay

FSYNC from RXN/RXP

-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)