VT8235 datasheet(80/145 Pages) VIA

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VT8235 V-Link South Bridge

Revision 1.22 October 24, 2002

-74-

Device 17 Function 0 Power Management Registers

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Offset 85-84 - Primary Interrupt Channel (0000h) ........RW

If a device IRQ is enabled as a Primary IRQ, that device’s

IRQ can be used to generate wake events. The bits in this

PMIO Rx28[7] – Primary Resume Status

PMIO Rx2A[7] – Primary Resume Enable

If a device on one of the IRQ’s is set to enable the Primary

Interrupt, once the device generates an IRQ, the PMIO

Rx28[7] status bit will become 1 to report the occurrence of

the Primary IRQ.

If PMIO Rx2A[7] is set to 1 to enable

Resume-on-Primary-IRQ, the IRQ then becomes a wake

event.

1/0 = Ena/Disa IRQ15 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ14 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ13 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ12 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ11 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ10 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ9 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ8 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ7 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ6 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ5 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ4 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ3 as Primary Intrpt Channel

Reserved

........................................ always reads 0

1/0 = Ena/Disa IRQ1 as Primary Intrpt Channel

1/0 = Ena/Disa IRQ0 as Primary Intrpt Channel

Offset 87-86 - Secondary Interrupt Channel (0000h) .... RW

For legacy PMU, the bits in this register are used in

conjunction with:

PMIO Rx28[1] – Secondary Event Timer Timeout Status

PMIO Rx2A[7] – SMI on Secondary Event Timer Timeout

Secondary IRQ’s are different from Primary IRQ’s in that

systems that resume due to a Secondary IRQ can return

directly to suspend state after the secondary event timer times

out. For this to work, PMIO Rx2A[1] needs to be set to one to

enable SMI-on-Secondary-Event-Timer-Timeout (when PMIO

Rx28[1] = 1). The timer’s count value can be set via Rx93-

90[27-26].

1/0 = Ena/Disa IRQ15 as Secondary Intr Channel

1/0 = Ena/Disa IRQ14 as Secondary Intr Channel

1/0 = Ena/Disa IRQ13 as Secondary Intr Channel

1/0 = Ena/Disa IRQ12 as Secondary Intr Channel

1/0 = Ena/Disa IRQ11 as Secondary Intr Channel

1/0 = Ena/Disa IRQ10 as Secondary Intr Channel

1/0 = Ena/Disa IRQ9 as Secondary Intr Channel

1/0 = Ena/Disa IRQ8 as Secondary Intr Channel

1/0 = Ena/Disa IRQ7 as Secondary Intr Channel

1/0 = Ena/Disa IRQ6 as Secondary Intr Channel

1/0 = Ena/Disa IRQ5 as Secondary Intr Channel

1/0 = Ena/Disa IRQ4 as Secondary Intr Channel

1/0 = Ena/Disa IRQ3 as Secondary Intr Channel

Reserved

........................................always reads 0

1/0 = Ena/Disa IRQ1 as Secondary Intr Channel

1/0 = Ena/Disa IRQ0 as Secondary Intr Channel

VT8235 Datasheet(PDF) 80 Page - VIA Technologies, Inc.

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