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參數資料
型號: W83977TF
廠商: WINBOND ELECTRONICS CORP
英文描述: Multi-Function I/O Port Controller(用于個人計算機的多功能輸入/輸出口控制器)
中文描述: 多功能I / O端口控制器(用于個人計算機的多功能輸入/輸出口控制器)
文件頁數: 87/160頁
文件大小: 1012K
代理商: W83977TF
W83977TF
PRELIMINARY
Publication Release Date:March 1998
-77 -
Revision 0.62
9. ACPI REGISTERS FEATURES
W83977TF supports both ACPI and legacy power managements. The switch logic of the power
managment block generates an SMI
interrupt in the legacy mode and an SCI
interrupt in the ACPI
mode. For the legacy mode, the SMI_EN bit is used. If it is set, it routes the power management
events to the SMI
interrupt logic. For the ACPI mode, the SCI_EN bit is used. If it is set, it route the
power management events to the SCI
interrupt logic. The SMI_EN bit is located in the
configuration
register block of
Device A
and the SCI_EN bit is located in the PM1 register block. See the following
figure for illustration.
PM Timer
Device Idle
Timers
Device Trap
Timer
SMI_EN
SMI output
Logic
SCI output
Logic
Sleep/Wake
State machine
WAK_STS
Clock
Control
SCI
SMI
SCI Logic
Global STBY
from SMI to SCI
Bus Master SCI
0
1
SCI_EN
IRQs
IRQs
SMI Logic
from SCI to SMI
IRQs
The SMI
interrupt is routed to pin SMI, which is dedicated for the SMI
interrupt output. Another way
to output the SMI
interrupt is to route to pin IRQSER, which is the signal pin in the Serial IRQ mode.
The
SCI
interrupt can be routed to pin SCI, which is dedicated for the SCI
function. Or it can be
routed to one interrupt request pin, which is selected through CR70.bit3 - 0 of logical device 9.
Another way is to output the
SCI
interrupt to pin IRQSER
if serial IRQ mode is enabled
.
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