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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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ST7261 数据表(PDF) 30 Page - STMicroelectronics |
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ST7261 数据表(HTML) 30 Page - STMicroelectronics |
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30 / 80 page  ST7261 30/80 8.3 MISCELLANEOUS REGISTER MISCELLANEOUS REGISTER Read Write Reset Value - 0000 0000 (00h) Bits 7:4 = Reserved Bits 3:2 = SMS[1:0] Slow Mode Selection These bits select the Slow Mode frequency (de- pending on the oscillator frequency configured by option byte). Bit 1 = USBOE USB Output Enable 0: PA0 port free for general purpose I/O 1: USBOE alternate function enabled. The USB output enable signal is output on the PA0 port (at “1” when the ST7 USB is transmitting data). Bit 0 = MCO Main Clock Out 0: PB0 port free for general purpose I/O 1: MCO alternate function enabled (fCPU output on PB0 I/O port) 70 - - - - SMS1 SMS0 US- BOE MCO OSC12/6 SMS1 SMS0 Slow Mode Frequency (MHz.) fOSC= 6 MHz. 00 4 01 2 10 1 1 1 0.5 fOSC= 12 MHz. 00 8 01 4 10 2 11 1 |
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