FDC37B787QF SMSC [SMSC Corporation], FDC37B787QF Datasheet - Page 115

• Manufacturer Part Number: FDC37B787QF
• Description: Super I/O Controller with ACPI Support, Real Time Clock and Consumer IR
• Manufacturer: SMSC [SMSC Corporation]

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
118
T
R=Recovery
T=Turn-around
IRQ0 FRAME IRQ1 FRAME
S
None
R
T
S
IRQ1
R
T
IRQ2 FRAME
S
None
R
T