CS4270 데이터 시트보기 (PDF) - Cirrus Logic

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CS4270

24-Bit, 192 kHz Stereo Audio CODEC

Cirrus Logic 

SWITCHING CHARACTERISTICS - I²C MODE CONTROL PORT

(Inputs: logic 0 = DGND, logic 1 = VLC)

Parameter

Symbol

Min

I²C Mode

SCL Clock Frequency

fscl

-

RST Rising Edge to Start

tirs

500

Bus Free Time Between Transmissions

tbuf

4.7

Start Condition Hold Time (prior to first clock pulse)

thdst

4.0

Clock Low time

tlow

4.7

Clock High Time

thigh

4.0

Setup Time for Repeated Start Condition

tsust

4.7

SDA Hold Time from SCL Falling

(Note 19)

thdd

0

SDA Setup time to SCL Rising

tsud

250

Rise Time of Both SDA and SCL Lines

tr

-

Fall Time of Both SDA and SCL Lines

tf

-

Setup Time for Stop Condition

tsusp

4.7

Max

100

-

-

-

-

-

-

-

-

1

300

-

19. Data must be held for sufficient time to bridge the 300 ns transition time of SCL.

CS4270

Unit

kHz

ns

µs

µs

µs

µs

µs

µs

ns

µs

ns

µs

RST

t irs

Stop

Start

Repeated

Start

SDA

SCL

t buf

t hdst

t high

t hdst

tf

t low t hdd

t sud

t sust

tr

Figure 12. I²C Mode Control Port Timing

Stop

t susp

20

DS686PP1

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