FDC37B78X SMSC Corporation, FDC37B78X Datasheet - Page 117
FDC37B78X
Manufacturer Part Number
FDC37B78X
Description
Enhanced Super I/O Controller with ACPI Support/ Real Time Clock and Consumer IR
Manufacturer
SMSC Corporation
Datasheet
1.FDC37B78X.pdf
(258 pages)
- Current page: 117 of 258
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SERIAL INTERRUPTS
The FDC37B78x will support the serial interrupt to transmit interrupt information to the host system.
The serial interrupt scheme adheres to the Serial IRQ Specification for PCI Systems, Version 6.0.
Timing Diagrams For IRQSER Cycle
PCICLK
IRQSER
Drive Source
A) Start Frame timing with source sampled a low pulse on IRQ1
PCICLK = 33Mhz_IN pin
IRQSER = SIRQ pin
1) Start Frame pulse can be 4-8 clocks wide.
IRQ1
SL
or
H
H=Host Control
SL=Slave Control
START
Host Controller
START FRAME
H
1
S=Sample
R
117
T
R=Recovery
T=Turn-around
IRQ0 FRAME IRQ1 FRAME
S
None
R
T
S
IRQ1
R
T
IRQ2 FRAME
S
None
R
T
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