fdc37m707 Standard Microsystems Corp., fdc37m707 Datasheet - Page 113

• Manufacturer Part Number: fdc37m707
• Description: Fdc37m707 Enhanced Super I/o Controller With Wake-up Features
• Manufacturer: Standard Microsystems Corp.

The Serial IRQ 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.
The SMI is enabled onto the SMI frame of the Serial IRQ via bit 6 of SMI Enable Register 2.
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
113
# OF CLOCKS PAST START
11
14
17
20
23
26
29
32
35
38
41
44
47
2
5
8