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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST7FOXK2 датащи(PDF) 211 Page - STMicroelectronics |
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ST7FOXK2 датащи(HTML) 211 Page - STMicroelectronics |
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211 / 226 page  ST7FOXF1, ST7FOXK1, ST7FOXK2 Device configuration and ordering information 211/226 13 Device configuration and ordering information This device is available for production in user programmable version (Flash). ST7FOX XFlash devices are shipped to customers with a default program memory content (FFh). 13.1 Option bytes The two option bytes allow the hardware configuration of the microcontroller to be selected. The option bytes can be accessed only in programming mode (for example using a standard ST7 programming tool). 13.1.1 Option byte 1 Bits 7:6 = CKSEL[1:0] Start-up clock selection. These bits are used to select the startup frequency. By default, the internal RC is selected. Bits 5:3 = Reserved, must always be 1. Bit 2 = LVD Low Voltage Detection selection. This option bit enables the low voltage detection block (LVD). 0: LVD on 1: LVD off (default value) Bit 1 = WDG SW Hardware or software watchdog This option bit selects the watchdog type. 0: Hardware (watchdog always enabled) 1: Software (watchdog to be enabled by software) Bit 0 = WDG HALT Watchdog Reset on Halt This option bit determines if a Reset is generated when entering Halt mode while the Watchdog is active. 0: No Reset generation when entering Halt mode 1: Reset generation when entering Halt mode Table 92. Startup clock selection Configuration CKSEL1 CKSEL0 Internal RC as Startup Clock 0 0 AWU RC as a Startup Clock 0 1 External crystal/ceramic resonator 1 0 External Clock 1 1 |
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