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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST7263BEx 데이터시트(PDF) 62 Page - STMicroelectronics |
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ST7263BEx 데이터시트(HTML) 62 Page - STMicroelectronics |
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62 / 186 page  On-chip peripherals ST7263Bxx 62/186 Doc ID 7516 Rev 8 A minimum of four falling edges of the CPU clock must occur between two consecutive active edges of the external clock; thus the external clock frequency must be less than a quarter of the CPU clock frequency. Figure 29. Counter timing diagram, internal clock divided by 2 1. The MCU is in reset state when the internal reset signal is high, when it is low the MCU is running. Figure 30. Counter timing diagram, internal clock divided by 4 1. The MCU is in reset state when the internal reset signal is high, when it is low the MCU is running. Figure 31. Counter timing diagram, internal clock divided by 8 1. The MCU is in reset state when the internal reset signal is high, when it is low the MCU is running. CPU CLOCK FFFD FFFE FFFF 0000 0001 0002 0003 INTERNAL RESET TIMER CLOCK COUNTER REGISTER TIMER OVERFLOW FLAG (TOF) FFFC FFFD 0000 0001 CPU CLOCK INTERNAL RESET TIMER CLOCK COUNTER REGISTER TIMER OVERFLOW FLAG (TOF) CPU CLOCK INTERNAL RESET TIMER CLOCK COUNTER REGISTER TIMER OVERFLOW FLAG (TOF) FFFC FFFD 0000 |
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