FDC37B770 SMSC [SMSC Corporation], FDC37B770 Datasheet - Page 113

• Manufacturer Part Number: FDC37B770
• Description: ENHANCED SUPER I/O CONTROLLER WITH WAKE UP FEATURES
• Manufacturer: SMSC [SMSC Corporation]

PCICLK
IRQSER
Driver
B) Stop Frame Timing with Host using 17 IRQSER sampling period
1)
2)
3)
S
FRAME
None
IRQ14
Stop pulse is 2 clocks wide for Quiet mode, 3 clocks wide for Continuous mode.
There may be none, one or more Idle states during the Stop Frame.
The next IRQSER cycle’s Start Frame pulse may or may not start immediately
after the turn-around clock of the Stop Frame.
R
T
S
IRQ15
IRQ15
FRAME
R
H=Host Control
R=Recovery
T
S
IOCHCK#
None
FRAME
I= Idle.
113
R
T
I
T=Turn-around
S=Sample
2
STOP FRAME
Host Controller
STOP
H
1
R
T
NEXT CYCLE
START
3