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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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H8/3003 数据表(PDF) 79 Page - Renesas Technology Corp |
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H8/3003 数据表(HTML) 79 Page - Renesas Technology Corp |
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79 / 715 page  Bits 6 to 4—Standby Timer Select (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. Set these bits so that the waiting time will be at least 8 ms at the system clock rate. For further information about waiting time selection, see section 17.4.3, Selection of Oscillator Waiting Time after Exit from Software Standby Mode. Bit 6 Bit 5 Bit 4 STS2 STS1 STS0 Description 000Waiting time = 8192 states (Initial value) 001Waiting time = 16384 states 010Waiting time = 32768 states 011Waiting time = 65536 states 1 0 — Waiting time = 131072 states 1 1 — Waiting time = 4 states 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 Bit 1—Reserved: Read-only bit, always read as 1. Bit 0—RAM Enable (RAME): Enables or disables the on-chip RAM. The RAME bit is initialized by the rising edge of the RES signal. It is not initialized in software standby mode. Bit 0 RAME Description 0 On-chip RAM is disabled 1 On-chip RAM is enabled (Initial value) 61 |
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