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UM1817 数据表(PDF) 21 Page - STMicroelectronics |
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UM1817 数据表(HTML) 21 Page - STMicroelectronics |
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21 / 58 page  DocID026902 Rev 3 21/58 UM1817 Hardware layout and configuration 57 2.12 LDR (Light Dependent Resistor) The VDDA is divided by resistor bridge of LDR VT9ON1 and 8.2K resistor and connected to PA1 (COM1_IN+/ADC IN1) as shown below in Figure 7 on the STM32091C-EVAL evaluation board. Figure 7. GP comparator 1 It is possible to compare LDR output with 1/4 band gap, 1/2 band gap, 3/4 band gap, band gap and DAC1 OUT and to connect LDR output to ADC IN1 for AD conversion. 2.13 Temperature sensor A temperature sensor STLM75M2F is connected to I2C1 bus of the STM32F091VCT6, and share same I2C1 bus with RF-EEPROM and DDC on HDMI_Source connector CN4. I2C address of temperature sensor is 0b100100 (A0), A0 can be 0 or 1, depending on the setting of SB1, see Table 13. |
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