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STM8AL3L8x Datasheet(PDF) 101 Page - STMicroelectronics |
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STM8AL3L8x Datasheet(HTML) 101 Page - STMicroelectronics |
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101 / 131 page  DocID027179 Rev 6 101/131 STM8AL318x STM8AL3L8x Electrical parameters 117 I2C - Inter IC control interface Subject to general operating conditions for VDD, fSYSCLK, and TA unless otherwise specified. The STM8AL I2C interface (I2C1) meets the requirements of the Standard I2C communication protocol described in the following table with the restriction mentioned below: Refer to I/O port characteristics for more details on the input/output alternate function characteristics (SDA and SCL). Note: For speeds around 200 kHz, the achieved speed has a ± 5% tolerance. For other speed ranges, the achieved speed has a ± 2% tolerance. The above variations depend on the accuracy of the external components used. Table 47. I2C characteristics Symbol Parameter Standard mode I2C Fast mode I2C(1) 1. fSYSCLK must be at least equal to 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 - ns th(SDA) SDA data hold time 0 - 0 900 tr(SDA) tr(SCL) SDA and SCL rise time - 1000 - 300 tf(SDA) tf(SCL) SDA and SCL fall time - 300 - 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 - Cb Capacitive load for each bus line - 400 - 400 pF |
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