Fujitsu F2MC-16LX Hardware Manual page 71

Mb90550a/b series, 16-bit

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■ Notes in Connection with Using the EI

For a resource in which the same interrupt number has two possible interrupt causes, both

interrupt request flags are cleared by the EI

feature is used when either of the two causes is effective, the other interrupt feature cannot be

used. Set the interrupt request permission bit of the corresponding resource to "0" and address

the problem by software polling. (See Table 3.2-2.)

Table 3.2-2 When the EI

Extended I/O serial 1

16-bit free-run timer (I/O timer) overflow

OS Feature by Extended I/O Serial 2

OS Feature is Used by Extended I/O Serial 2

Interrupt factor

OS interrupt clear signal. Therefore, if the EI

3.2 Interrupt Causes