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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PM0214 데이터시트(PDF) 230 Page - STMicroelectronics |
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PM0214 데이터시트(HTML) 230 Page - STMicroelectronics |
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230 / 245 page  Core peripherals PM0214 230/245 DocID022708 Rev 4 4.5 SysTick timer (STK) The processor has a 24-bit system timer, SysTick, that counts down from the reload value to zero, reloads (wraps to) the value in the STK_LOAD register on the next clock edge, then counts down on subsequent clocks. When the processor is halted for debugging the counter does not decrement. Table 54. System timer registers summary Address Name Type Required privilege Reset value Description 0xE000E010 STK_CTRL RW Privileged 0x00000000 SysTick control and status register (STK_CTRL) on page 231 0xE000E014 STK_LOAD RW Privileged Unknown SysTick reload value register (STK_LOAD) on page 232 0xE000E018 STK_VAL RW Privileged Unknown SysTick current value register (STK_VAL) on page 233 0xE000E01C STK_CALIB RO Privileged 0xC0000000 SysTick calibration value register (STK_CALIB) on page 234 |
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