HTS221 datasheet(10/33 Pages) STMICROELECTRONICS

Numer części	HTS221

Szczegółowy opis	Capacitive digital sensor for relative humidity and temperature

PDF	33 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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10 / 33 page

Sensor parameters and electrical specifications

HTS221

10/33

DocID026333 Rev 4

2.1.2

I²C - control interface

Subject to general operating conditions for VDD and TOP.

Figure 4. I²C slave timing diagram

Note:

Measurement points are done at 0.2·VDD and 0.8·VDD, for both ports.

Table 6. I²C slave timing values

Symbol

Parameter (1)

I²C standard

mode (1)

I²C fast mode (1)

Unit

Min.

Max.

Min.

Max.

f(SCL)

SCL clock frequency

100

400

kHz

tw(SCLL)

SCL clock low time

4.7

1.3

μs

tw(SCLH)

SCL clock high time

4.0

0.6

tsu(SDA)

SDA setup time

250

100

th(SDA)

SDA data hold time

0.01

3.45

0.9

μs

tr(SDA) tr(SCL) SDA and SCL rise time

1000

20 + 0.1Cb (2)

300

tf(SDA) tf(SCL) SDA and SCL fall time

300

20 + 0.1Cb (2)

300

th(ST)

START condition hold time

0.6

μs

tsu(SR)

Repeated START condition setup time

4.7

0.6

tsu(SP)

STOP condition setup time

0.6

tw(SP:SR)

Bus free time between STOP and

START condition

4.7

1.3

1. Data based on standard I²C protocol requirement, not tested in production.

2. Cb = total capacitance of one bus line, in pF.

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