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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F730V8 датащи(PDF) 32 Page - STMicroelectronics |
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STM32F730V8 датащи(HTML) 32 Page - STMicroelectronics |
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32 / 202 page  Functional overview STM32F730x8 32/202 DS12536 Rev 2 3.16.2 Regulator OFF This feature is available only on packages featuring the BYPASS_REG pin. The regulator is disabled by holding BYPASS_REG high. The regulator OFF mode allows to supply externally a V12 voltage source through VCAP_1 and VCAP_2 pins. Since the internal voltage scaling is not managed internally, the external voltage value must be aligned with the targeted maximum frequency.The two 2.2 µF ceramic capacitors should be replaced by two 100 nF decoupling capacitors. When the regulator is OFF, there is no more internal monitoring on V12. An external power supply supervisor should be used to monitor the V12 of the logic power domain. The PA0 pin should be used for this purpose, and act as power-on reset on V12 power domain. In regulator OFF mode, the following features are no more supported: • PA0 cannot be used as a GPIO pin since it allows to reset a part of the V12 logic power domain which is not reset by the NRST pin. • As long as PA0 is kept low, the debug mode cannot be used under power-on reset. As a consequence, PA0 and NRST pins must be managed separately if the debug connection under reset or pre-reset is required. • The over-drive and under-drive modes are not available. • The Standby mode is not available. Table 3. Voltage regulator configuration mode versus device operating mode(1) 1. ‘-’ means that the corresponding configuration is not available. Voltage regulator configuration Run mode Sleep mode Stop mode Standby mode Normal mode MR MR MR or LPR - Over-drive mode(2) 2. The over-drive mode is not available when VDD = 1.7 to 2.1 V. MR MR - - Under-drive mode - - MR or LPR - Power-down mode -- - Yes |
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