FDC37B77X SMSC Corporation, FDC37B77X Datasheet - Page 115

• Manufacturer Part Number: FDC37B77X
• Description: ENHANCED SUPER I/O CONTROLLER WITH WAKE UP FEATURES
• Manufacturer: SMSC Corporation

The SIRQ data frame will now support IRQ2 from a logical device, previously IRQSER Period 3 was
reserved for use by the System Management Interrupt (nSMI). When using Period 3 for IRQ2 the user
should mask off the SMI via the SMI Enable Register. Likewise, when using Period 3 for nSMI the
user should not configure any logical devices as using IRQ2.
IRQSER Period 14 is used to transfer IRQ13. Logical devices 0 (FDC), 3 (Par Port), 4 (Ser Port 1), 5
(Ser Port 2), 6 (RTC), and 7 (KBD) shall have IRQ13 as a choice for their primary interrupt.
IRQSER PERIOD
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
SIGNAL SAMPLED
IRQSER Sampling Periods
nSMI/IRQ2
Not Used
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
IRQ1
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
115
# OF CLOCKS PAST START
11
14
17
20
23
26
29
32
35
38
41
44
47
2
5
8