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CS5530 数据表(PDF) 68 Page - National Semiconductor (TI) |
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CS5530 数据表(HTML) 68 Page - National Semiconductor (TI) |
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68 / 241 page  www.national.com 68 Revision 4.1 Functional Description (Continued) Table 3-24. User Defined Device 3 (UDEF3) Idle Timer and Trap Related Registers Bit Description F0 Index 81h Power Management Enable Register 4 (R/W) Reset Value = 00h 6 User Defined Device 3 (UDEF3) Idle Timer Enable: Turn on UDEF3 Idle Timer Count Register (F0 Index A4h) and gen- erate an SMI when the timer expires: 0 = Disable; 1 = Enable. If an access occurs in the programmed address range the timer is reloaded with the programmed count. UDEF3 address programming is at F0 Index C8h (base address register) and CEh (control register). Top level SMI status is reported at F1BAR+Memory Offset 00h/02h[0]. Second level SMI status is reported at F0 Index 85h/F5h[6]. F0 Index 82h Power Management Enable Register 3 (R/W) Reset Value = 00h 6 User Defined Device 3 (UDEF3) Trap: 0 = Disable; 1 = Enable. If this bit is enabled and an access occurs in the programmed address range an SMI is generated. UDEF3 address pro- gramming is at F0 Index C8h (base address register) and CEh (control register). Top level SMI status is reported at F1BAR+Memory Offset 00h/02h[9]. Second level SMI status is reported at F1BAR+Memory Offset 04h/06h[4]. F0 Index A4h-A5h User Defined Device 3 Idle Timer Count Register (R/W) Reset Value = 0000h 15:0 User Defined Device 3 (UDEF3) Idle Timer Count: This idle timer determines when the device configured as UDEF3 is not in use so that it can be power managed. The 16-bit value programmed here represents the period of inactivity for this device after which the system is alerted via an SMI. The timer is automatically reloaded with the count value whenever an access occurs to memory or I/O address space configured in the UDEF3 Base Address Register (F0 Index C8h) and UDEF3 Control Register (F0 Index CEh). The counter uses a 1 second timebase. To enable this timer set F0 Index 81h[6] = 1. Top level SMI status is reported at F1BAR+Memory Offset 00h/02h[0]. Second level SMI status is reported at F0 Index 85h/F5h[6]. F0 Index C8h-CBh User Defined Device 3 Base Address Register (R/W) Reset Value = 00000000h 31:0 User Defined Device 3 (UDEF3) Base Address [31:0]: This 32-bit register supports power management (trap and idle timer resources) for a PCMCIA slot or some other device in the system. The value written is used as the address compar- ator for the device trap/timer logic. The device can be memory or I/O mapped (configured in F0 Index CEh). F0 Index CEh User Defined Device 3 Control Register (R/W) Reset Value = 00h 7 Memory or I/O Mapped: User Defined Device 3 is: 0 = I/O; 1 = Memory. 6:0 Mask: If bit 7 = 0 (I/O): Bit 6 0 = Disable write cycle tracking 1 = Enable write cycle tracking Bit 5 0 = Disable read cycle tracking 1 = Enable read cycle tracking Bits 4:0 Mask for address bits A[4:0] If bit 7 = 1 (M/IO): Bits 6:0 Mask for address memory bits A[15:9] (512 bytes min. and 64 KB max.) and A[8:0] are ignored. Note: A "1" in a mask bit means that the address bit is ignored for comparison. |
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