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数据搜索系统，热门电子元器件搜索 |
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CS5535 数据表(PDF) 166 Page - National Semiconductor (TI) |
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CS5535 数据表(HTML) 166 Page - National Semiconductor (TI) |
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166 / 555 page  www.national.com 166 Revision 0.8 PMC Functional Description (Continued) 4.17.5 PMC Power Management Events A large number of inputs to the PMC are used to monitor and create system power managements events. Some of these inputs apply the Working state machine while the remainder apply to the Standby state machine. 4.17.5.1 PM Sleep Events • Sleep: — Sleep sequence initiated by software • Wakeup: — Assertion of the Sleep Button (SLEEP_BUT) — Assertion of the Power Button (PWR_BUT#) —RTC alarm — Working power domain PMEs — Standby power domain PMEs 4.17.5.2 PM Standby Events • Standby: — Sleep sequence initiated by software — LVD detection of low voltage on VCORE (system fault) — Assertion of the Power Button for 4 seconds (PWR_BUT#, system fault) — Thermal Alarm (THRM_ALRM#, system fault) — Low battery (LOW_BAT#, system fault) — Hardware reset (system restart) — Software initiated reset (system restart) — Shutdown initiated reset, CPU triple fault (system restart) — Watchdog initiated reset (system restart) — GLCP software initiated reset (system restart) — Bad packet type reset (system restart) — Reset Standby state machine RESET_STAND# (Standby) • Wakeup: — Assertion of the Power Button (PWR_BUT#) —RTC Alarm — Standby power domain PMEs Table 4-35 provides a complete list of the power manage- ment inputs and describes their function. The system can only be in one of three states: Working, Sleep, or Standby. The activity of the inputs is to move the system from one state to another. Table 4-35. PM Events and Functions Event Current State Function The following events are Sleep and/or Standby wakeup events (except for ACPI Timer). PWR_BTN# (also serves as a Standby event) Working Sets the status bit (PWRBTN_STS) in PM1_STS (ACPI I/O Offset 00h[8] = 1). If PWRBTN_EN is enabled (ACPI I/O Offset 02h[8] = 1), an SCI is generated. Sleep Sets the status bit (PWRBTN_STS) in PM1_STS (ACPI I/O Offset 00h[8] = 1). If PWRBTN_EN is enabled (ACPI I/O Offset 02h[8] = 1), SCI generation and wakeup from this event is enabled (i.e., sets the WAK_STS bit, ACPI I/O Offset 00h[15] = 1). Standby Sets the status bit (PWRBTN_STS) in PM1_STS (ACPI I/O Offset 00h[8] = 1). If PWRBTN_EN is enabled (ACPI I/O Offset 02h[8] = 1), SCI generation and wakeup from this event is enabled (i.e., sets the WAK_STS bit, ACPI I/O Offset 00h[15] = 1). SLP_BTN Working Sets the status bit (SLPBTN_STS) in PM1_STS (ACPI I/O Offset 00h[9] = 1). If SLPBTN_EN is enabled (ACPI I/O Offset 02h[9] = 1), an SCI is generated. Sleep Sets the status bit (SLPBTN_STS) in PM1_STS (ACPI I/O Offset 00h[9] = 1). If SLPBTN_EN is enabled (ACPI I/O Offset 02h[9] = 1), SCI generation and wakeup from this event is enabled (i.e., sets the WAK_STS bit, ACPI I/O Offset 00h[15] = 1). RTC Alarm Working Sets the status bit (RTC_STS) in PM1_STS (ACPI I/O Offset 00h[10] = 1). If RTC_EN is enabled (ACPI I/O Offset 02h[10] = 1), an SCI is generated. Sleep Sets the status bit (RTC_STS) in PM1_STS (ACPI I/O Offset 00h[10] = 1). If RTC_EN is enabled (ACPI I/O Offset 02h[10] = 1), SCI generation and wakeup from this event is enabled (i.e., sets the WAK_STS bit, ACPI I/O Offset 00h[15] = 1). Standby Sets the status bit (RTC_STS) in PM1_STS (ACPI I/O Offset 00h[10] = 1). If RTC_EN is enabled (ACPI I/O Offset 02h[10] = 1), SCI generation and wakeup from this event is enabled (i.e., sets the WAK_STS bit, ACPI I/O Offset 00h[15] = 1). ACPI Timer (internal timer) Working Sets the status bit (TMR_STS) in PM1_STS (ACPI I/O Offset 00h[0] = 1). If TMR_EN is enabled (ACPI I/O Offset 02h[0] = 1), an SCI is generated. |
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