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ST9 Datasheet(PDF) 62 Page - STMicroelectronics |
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ST9 Datasheet(HTML) 62 Page - STMicroelectronics |
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62 / 146 page  62/146 ST9 USER GUIDE Figure 25 . INTCLK and CPUCLK Flow Chart WFI LPOWFI==0 Yes No No Yes Previous WFI_CKSEL==0 Yes No CK_AF Yes No Present CLOCK2/16 CLOCK2/16 CK_AF Instruction XT_DIV16==0 Yes No CLOCK2/16 (PLL OFF) CSU_CKSEL=0 PLL-CLOCK CLOCK2 (PLL OFF) LOW POWER Reduced power consumption Slow mode Reduced power consumption Fast mode CPUCLK Stopped CPUCLK=INTCLK/N INTCLK= PLL is OFF CKAF_SEL=0 CKAF_ST=0 CKAF_SEL=1 CKAF_ST=1 CSU_CKSEL=0 CSU_CKSEL=0 CLOCK CSU_CKSEL==0 Yes No CLOCK2 (PLL ON) DX2:0==7 No Yes DX2:0==7 Yes No CKAF_SEL==0 Yes No CK_AF No Yes Present CK_AF |
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