STR91XF datasheet(64/72 Pages) STMICROELECTRONICS

部件名	STR91XF

功能描述	ARM966E-S 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC Motor Control, 4 Timers, ADC, RTC, DMA

PDF	72 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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64 / 72 page

Electrical characteristics

STR91xF

64/72

6.13.4 I2C electrical characteristics

VDDQ = 2.7 - 3.6V, VDD = 1.65 - 2V, TA = -40 / 85 °C unless otherwise specified.

Table 24.

I2C Electrical Characteristics

Notes: 1 The device must internally provide a hold time of at least 300 ns for the SDA signal in order to

bridge the undefined region of the falling edge of SCL

2 The maximum hold time of the START condition has only to be met if the interface does not

stretch the low period of SCL signal

3Cb = total capacitance of one bus line in pF

Symbol

Parameter

Standard I2C

Fast I2C

Unit

MinMax

tBUF

Bus free time between a STOP

and START condition

4.7

1.3

tHD:STA

Hold time START condition.

After this period, the first clock

pulse is generated

4.0

0.6

µs

tLOW

LOW period of the SCL clock

4.7

1.3

µs

tHIGH

HIGH period of the SCL clock

4.0

0.6

µs

tSU:STA

Set-up time for a repeated

START condition

4.7

0.6

µs

tHD:DAT

Data hold time

tSU:DAT

Data set-up time

250

100

Rise time of both SDA and SCL

signals

1000

20+0.1Cb

300

Fall time of both SDA and SCL

signals

300

20+0.1Cb

300

tSU:STO

Set-up time for STOP condition

4.0

0.6

µs

Capacitive load for each bus

line

400

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