STM8S903K3 datasheet(82/121 Pages) STMICROELECTRONICS

Part #	STM8S903K3

Description	16 MHz STM8S 8-bit MCU, up to 8 Kbytes Flash, 1 Kbyte RAM, 640 bytes EEPROM,10-bit ADC, 2 timers, UART, SPI, IC

PDF	121 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Electrical characteristics

STM8S903K3 STM8S903F3

82/121

DocID15590 Rev 10

10.3.9

I2C interface characteristics

Figure 42. Typical application with I2C bus and timing diagram

Table 46. I2C characteristics

Symbol

Parameter

Standard mode I2CFast mode I2C(1)

1. fMASTER, must be at least 8 MHz to achieve max fast I2C speed (400 kHz)

Unit

Min(2)

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

Max(2)

Min(2)

Max(2)

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(3)

3. The maximum hold time of the start condition has only to be met if the interface does not stretch the low

time

0(4)

4. 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

900(3)

tr(SDA)

tr(SCL)

SDA and SCL rise time



(VDD = 3 to 5.5 V)

1000

300

tf(SDA)

tf(SCL)

SDA and SCL fall time



(VDD = 3 to 5.5 V)

300

th(STA)

START condition hold time

4.0

0.6

µs

tsu(STA)

Repeated START condition setup time

4.7

0.6

tsu(STO)

STOP condition setup time

4.0

0.6

tw(STO:STA)

STOP to START condition time



(bus free)

4.7

1.3

Capacitive load for each bus line

400

STM8S903K3 Datasheet(PDF) 82 Page - STMicroelectronics

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