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L99ASC03 数据表(PDF) 17 Page - STMicroelectronics |
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L99ASC03 数据表(HTML) 17 Page - STMicroelectronics |
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17 / 73 page ![]() DocID023504 Rev 7 17/73 L99ASC03 Device description 72 2.5.6 Functional overview 2.6 DIS pin The DIS pin allows turning off the gate drivers when applying an external signal to it. A logic low signal enables the gate drivers, whereas a logic high signal disables the gate drivers. The state of the DIS pin is reported in the DISABLE flag. To activate the gate drivers, the DIS pin has to be pulled low and the DISABLE flag has to be cleared by an SPI "Read & Clear" command. An internal pull-up resistor is integrated for this pin. 2.7 INH pin The INH pin can be used as a wake-up source connected to ignition through an external resistor. An internal comparator detects a high level and generates a wake-up event. The INHST bit reflects the current logic state of this pin. 2.8 Thermal warning and thermal shutdown To allow for different application requirements, two temperature modes with their respective diagnostics can be selected via SPI. Table 3. Functional overview Function Operating mode Active mode FLASH mode VDD standby VBAT standby Normal Fail-safe VDD voltage regulator ON(1) 1. OFF in case Tj > TSD2 ON ON OFF Reset generator ON ON ON OFF Interrupt generator OFF OFF ON ON Window watchdog ON OFF OFF(2) 2. ON when IVDD > ICMP and SPI bit ICMP = 0 OFF Gate driver ON OFF ON OFF OFF Charge pump ON OFF ON OFF OFF CSA ON OFF ON OFF OFF BEMF module ON OFF ON OFF OFF Oscillator ON ON OFF(3) 3. ON during wake-up event, temperature and ICMP filtering OFF(3) Diagnostics ON ON OFF(4) 4. Temperature, ICMP monitoring and VDD undervoltage detection are active OFF |
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