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LQFP100 数据表(PDF) 57 Page - STMicroelectronics |
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LQFP100 数据表(HTML) 57 Page - STMicroelectronics |
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57 / 133 page  DocID15131 Rev 9 57/133 SPC560B54x/6x Electrical characteristics 132 For a detailed description of the NVUSRO register, please refer to the device reference manual. 4.2.1 NVUSRO[PAD3V5V] field description The DC electrical characteristics are dependent on the PAD3V5V bit value. Table 9 shows how NVUSRO[PAD3V5V] controls the device configuration. 4.2.2 NVUSRO[OSCILLATOR_MARGIN] field description The fast external crystal oscillator consumption is dependent on the OSCILLATOR_MARGIN bit value. Table 10 shows how NVUSRO[OSCILLATOR_MARGIN] controls the device configuration. 4.2.3 NVUSRO[WATCHDOG_EN] field description The watchdog enable/disable configuration after reset is dependent on the WATCHDOG_EN bit value. Table 11 shows how NVUSRO[WATCHDOG_EN] controls the device configuration. Table 9. PAD3V5V field description(1) 1. See the device reference manual for more information on the NVUSRO register. Value(2) 2. Default manufacturing value is ‘1’. Value can be programmed by customer in Shadow Flash. Description 0 High voltage supply is 5.0 V 1 High voltage supply is 3.3 V Table 10. OSCILLATOR_MARGIN field description(1) 1. See the device reference manual for more information on the NVUSRO register. Value(2) 2. Default manufacturing value is ‘1’. Value can be programmed by customer in Shadow Flash. Description 0 Low consumption configuration (4 MHz/8 MHz) 1 High margin configuration (4 MHz/16 MHz) Table 11. WATCHDOG_EN field description Value(1) 1. Default manufacturing value is ‘1’. Value can be programmed by customer in Shadow Flash. Description 0 Disable after reset 1 Enable after reset |
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