Table 47 - IRQSER Sampling Periods
IRQSER PERIOD
SIGNAL SAMPLED
Not Used
IRQ1
NUMBER OF CLOCKS PAST START
1
2
2
5
3
IRQ2
8
4
5
6
7
8
9
10
11
12
13
14
15
16
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ8
IRQ9
IRQ10
IRQ11
IRQ12
IRQ13
IRQ14
IRQ15
11
14
17
20
23
26
29
32
35
38
41
44
47
Note:
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). The FDC37M60x does not
support SMI.
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.
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