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AMD-766AC

AMD-766™ Peripheral Bus Controller

Advanced Micro Devices 

23167B – March 2001

Preliminary Information

AMD-766TM Peripheral Bus Controller Data Sheet

PIRQ_POLA = C3A54[EDGEPIA] & PIRQA#

| ~C3A54[EDGEPIA] & (~PIRQA# | SERINTA | (C1A08[8] & IRQ14) | (C1A08[10] & IRQ15) );

PIRQ_POLB = C3A54[EDGEPIB] & PIRQB#

| ~C3A54[EDGEPIB] & (~PIRQB# | SERINTB);

PIRQ_POLC = C3A54[EDGEPIC] & PIRQC#

| ~C3A54[EDGEPIC] & (~PIRQC# | SERINTC);

PIRQ_POLD = C3A54[EDGEPID] & PIRQD#

| ~C3A54[EDGEPID] & (~PIRQD# | SERINTD);

PCI_IRQx = PIRQ_POLA & (C3A56[3:0] == 4’hx) | PIRQ_POLB & (C3A56[7:4] == 4’hx)

| PIRQ_POLC & (C3A56[11:8] == 4’hx) | PIRQ_POLD & (C3A56[15:12] == 4’hx);

PNP_IRQx = PNPIRQ2 & (C3A44[11:8] == 4’hx) | PNPIRQ1 & (C3A44[7:4] == 4’hx)

| PNPIRQ0 & (C3A44[3:0] == 4’hx);

SCI_IRQx = SCI_IRQ & (C3A42[3:0] == 4’hx) & ~C0A4B[SCI2IOA];

TCO_IRQx = TCO_IRQ & (C3A44[2:0] == IRQ[11,10,or 9]) & C3A44[3]; // only applies to IRQs[11:9]

KIRQ1

KIRQ12

= EKIRQ1 & SERIRQ1; // to the USB keyboard emulation logic

= EKIRQ12 & SERIRQ12; // to the USB keyboard emulation logic

USB_IRQ1 = ~ExternalIRQEn & KIRQ1

// signal names from USB OHCI spec

| EmulationEnable & IRQEn & OutputFull & ~AuxOutputFull;

USB_IRQ12 = ~ExternalIRQEn & KIRQ12

// signal names from USB OHCI spec

| EmulationEnable & IRQEn & OutputFull & AuxOutputFull;

ISA_IRQx

= ~(IRQx & SERIRQx ) & // ISA_IRQ[15, 14, 12, 1] not included; these eqns are below

~( (C3A56[3:0] == 4’hx) | (C3A56[7:4] == 4’hx) | (C3A56[11:8] == 4’hx)

| (C3A56[15:12] == 4’hx) | (C3A44[11:8] == 4’hx) | (C3A44[7:4] == 4’hx)

| (C3A44[3:0] == 4’hx) | (C3A42[3:0] == 4’hx);

ISA_IRQ1

= ~(USB_IRQ1) &

~( (C3A56[3:0] == 4’h1) | (C3A56[7:4] == 4’h1) | (C3A56[11:8] == 4’h1)

| (C3A56[15:12] == 4’h1) | (C3A44[11:8] == 4’h1) | (C3A44[7:4] == 4’h1)

| (C3A44[3:0] == 4’h1) | (C3A42[3:0] == 4’h1);

ISA_IRQ12 = ~({C3A46[IRQ12_SEL] == 2’b00) ? IRQ12 : USB_IRQ12) &

~( (C3A56[3:0] == 4’hC) | (C3A56[7:4] == 4’hC) | (C3A56[11:8] == 4’hC)

| (C3A56[15:12] == 4’hC) | (C3A44[11:8] == 4’hC) | (C3A44[7:4] == 4’hC)

| (C3A44[3:0] == 4’hC) | (C3A42[3:0] == 4’hC);

ISA_IRQ14 = ~(IRQ14 & SERIRQ14 ) &

~( (C3A56[3:0] == 4’hE) | (C3A56[7:4] == 4’hE) | (C3A56[11:8] == 4’hE)

| (C3A56[15:12] == 4’hE) | (C3A44[11:8] == 4’hE) | (C3A44[7:4] == 4’hE)

| (C3A44[3:0] == 4’hE) | (C3A42[3:0] == 4’hE) | C1A08[8]);

ISA_IRQ15 = ~(IRQ15 & SERIRQ15 ) &

~( (C3A56[3:0] == 4’hF) | (C3A56[7:4] == 4’hF) | (C3A56[11:8] == 4’hF)

| (C3A56[15:12] == 4’hF) | (C3A44[11:8] == 4’hF) | (C3A44[7:4] == 4’hF)

| (C3A44[3:0] == 4’hF) | (C3A42[3:0] == 4’hF) | C1A08[10]);

PIC_IRQx = ~(ISA_IRQx | PCI_IRQx | PNP_IRQx | SCI_IRQx | TCO_IRQ);

Where:

x

PIRQ[A,B,C,D]#

SERINT[y]

SERIRQ[x]

USB_IRQ[12,1]

PNPIRQ[2:0]

SCI_IRQ

TCO_IRQ

IRQx

PIC_IRQx

The PIC IRQ number, 1, 3 through 7, 9 through 12, 14, and 15.

The input PCI interrupts (with the polarity of the external signals).

The PCI interrupts captured from the SERIRQ pin (with the same polarity as the SERIRQ pin).

The ISA interrupts captured from the SERIRQ pin (with the same polarity as the SERIRQ pin).

Outputs of the USB keyboard emulation logic from the USB controller.

PNP IRQ pins (with the polarity specified by the associated GPIO register).

Active-high SCI interrupt.

TCO interrupt; PM20[TCOSCI_STS].

External interrupt pin (with the polarity of external signals).

The interrupt signals that go to the PIC.

From the above equations, a few details can be derived:

• When a PCI, PNP, or SCI interrupt is enabled onto a PIC_IRQ, then the ISA and serial IRQ capability for the

IRQ is disabled.

• External IRQs and serial IRQs are designed to be edge triggered.

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