CS4220 datasheet(9/32 Pages) CIRRUS

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CS4220 CS4221

DS284PP3

SWITCHING CHARACTERISTICS - CONTROL PORT - I2C MODE (CS4221)

(TA = 25° C; VA, VD = 4.75 V - 5.25 V; Inputs: Logic 0 = DGND, Logic 1 = VD; CL = 30 pF)

Notes: 15. Not tested but guaranteed by design.

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

Parameter

Symbol

Min

Max

Unit

I2C® Mode (SPI/I2C = 1)

SCL Clock Frequency

fscl

-100

kHz

RST rising edge to Start

(Note 15)

tirs

µs

Bus Free Time between transmissions

tbuf

4.7

µs

Start Condition Hold Time (prior to first clock pulse)

thdst

4.0

µs

Clock Low Time

tlow

4.7

µs

Clock High Time

thigh

4.0

µs

Setup time for repeated Start Condition

tsust

4.7

µs

SDA hold time for SCL falling

(Note 16)

thdd

µs

SDA setup time to SCL rising

tsud

250

Rise time of SCL

trc

-25

Fall time of SCL

tfc

-25

Rise time of SDA

trd

-1

µs

Fall time of SDA

tfd

-300

Setup time for Stop Condition

tsusp

4.7

µs

buf

hdst

low

t rc

t fc

hdd

t high

t sud

t sust

t susp

Stop

Start

Stop

Repeated

SDA

SCL

irs

RST

t rd

t fd

Figure 3. I2C Control Port Timing

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