CS4297 datasheet(7/46 Pages) CIRRUS

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DS242F5

CS4297

CrystalClear™ SoundFusion™ Audio Codec ’97

DIGITAL CHARACTERISTICS (AVss = DVss = 0 V (See Grounding and Layout section))

SERIAL PORT TIMING

Parameter

Symbol

Min

Typ

Max

Unit

Low level input voltage

Vil

0.16 x DVdd

High level input voltage

Vih

0.40 x DVdd

High level output voltage

Voh

0.70 x DVdd

0.99 x DVdd

Low level output voltage

Vol

0.03

0.10 x DVdd

Input Leakage Current (AC-link inputs)

-10

µA

Output Leakage Current (Tri-stated AC-link outputs)

-10

µA

Output buffer drive current

(Note 4)

100

400

µA

Parameter

Symbol

Min

Typ

Max

Unit

RESET Timing

DVdd 90% maximum value to RESET# inactive pre-delay

(Note 4)

TVdd2rst#

1.5

RESET# active low pulse width

Trst_low

1.0

µs

RESET# inactive to BIT_CLK start-up delay

Trst2clk

42.7

1st SYNC active to CODEC READY set

Tsync2crd

40.6

µs

Clocks

BIT_CLK frequency

12.288

MHz

BIT_CLK period

Tclk_period

81.4

BIT_CLK output jitter (depends on XTAL_IN source)

750

BIT_CLK high pulse width

Tclk_high

40.7

BIT_CLK low pulse width

Tclk_low

40.7

SYNC frequency

kHz

SYNC period

Tsync_period

20.8

µs

SYNC high pulse width

Tsync_high

-1.3

µs

SYNC low pulse width

Tsync_low

19.5

µs

SYNC active to RESET# inactive pre-delay

Trst2snyc

250

Data Setup and Hold

Output Propagation delay from rising edge of BIT_CLK

Tprop

-6

Output hold from falling edge of BIT_CLK

Tohold

Input setup time from falling edge of BIT_CLK

Tisetup

Input hold time from falling edge of BIT_CLK

Tihold

Input Signal rise time

Tirise

Input Signal fall time

Tifall

Output Signal rise time

(Note 4)

Tofall

Output Signal fall time

(Note 4)

Tofall

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