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STM32F217VG 数据表(PDF) 108 Page - STMicroelectronics |
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STM32F217VG 数据表(HTML) 108 Page - STMicroelectronics |
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108 / 175 page  Electrical characteristics STM32F21xxx 108/175 DocID17050 Rev 9 6.3.19 Communications interfaces I2C interface characteristics STM32F215xx and STM32F217xx I2C interface meets the requirements of the standard I2C communication protocol with the following restrictions: the I/O pins SDA and SCL are mapped to are not “true” open-drain. When configured as open-drain, the PMOS connected between the I/O pin and VDD is disabled, but is still present. The I2C characteristics are described in Table 51. Refer also to Section 6.3.16: I/O port characteristics for more details on the input/output alternate function characteristics (SDA and SCL). Table 50. Characteristics of TIMx connected to the APB2 domain(1) 1. TIMx is used as a general term to refer to the TIM1, TIM8, TIM9, TIM10, and TIM11 timers. Symbol Parameter Conditions Min Max Unit tres(TIM) Timer resolution time AHB/APB2 prescaler distinct from 1, fTIMxCLK = 120 MHz 1- tTIMxCLK 8.3 - ns AHB/APB2 prescaler = 1, fTIMxCLK = 60 MHz 1- tTIMxCLK 16.7 - ns fEXT Timer external clock frequency on CH1 to CH4 fTIMxCLK = 120 MHz APB2 = 60 MHz 0 fTIMxCLK/2 MHz 060 MHz ResTIM Timer resolution - 16 bit tCOUNTER 16-bit counter clock period when internal clock is selected 1 65536 tTIMxCLK 0.0083 546 µs tMAX_COUNT Maximum possible count - 65536 × 65536 tTIMxCLK - 35.79 s |
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