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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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H8/3028F 数据表(PDF) 89 Page - Renesas Technology Corp |
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H8/3028F 数据表(HTML) 89 Page - Renesas Technology Corp |
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89 / 923 page  Rev. 2.00, 09/03, page 59 of 890 Bits 6 to 4—Standby Timer Select 2 to 0 (STS2 to STS0): These bits select the length of time the CPU and on-chip supporting modules wait for the internal clock oscillator to settle when software standby mode is exited by an external interrupt. When using a crystal oscillator, set these bits so that the waiting time will be at least 7 ms at the system clock rate. For further information about waiting time selection, see section 20.4.3, Selection of Waiting Time for Exit from Software Standby Mode. Bit 6 STS2 Bit 5 STS1 Bit 4 STS0 Description 0 0 0 Waiting time = 8,192 states (Initial value) 0 0 1 Waiting time = 16,384 states 0 1 0 Waiting time = 32,768 states 0 1 1 Waiting time = 65,536 states 1 0 0 Waiting time = 131,072 states 1 0 1 Waiting time = 262,144 states 1 1 0 Waiting time = 1,024 states 1 1 1 Illegal setting Bit 3—User Bit Enable (UE): Selects whether to use the UI bit in the condition code register as a user bit or an interrupt mask bit. Bit 3 UE Description 0 UI bit in CCR is used as an interrupt mask bit 1 UI bit in CCR is used as a user bit (Initial value) Bit 2—NMI Edge Select (NMIEG): Selects the valid edge of the NMI input. Bit 2 NMIEG Description 0 An interrupt is requested at the falling edge of NMI (Initial value) 1 An interrupt is requested at the rising edge of NMI |
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