Fujitsu F2MC-8L MB89620 Series Hardware Manual page 260

Table 12.3.2 External Interrupt 2 Control Register (EIC2) Bits
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
MB89620 series
Bit
• This bit is set to "1" when the edge selected by the edge polarity selection bit 3
(SEL3) is input to an external interrupt pin (INT3).
EIR3:
• An interrupt request is output when both this bit and the interrupt request enable
External interrupt
bit 3 (EIE3) are "1".
request flag bit 3
• Writing "0" clears this bit. Writing "1" has no effect and does not change the bit
value.
• The read value is indeterminate.
Unused bit
• Writing to this bit has no effect on the operation.
SEL3: • This bit selects the edge polarity that triggers interrupts when detected on pulses
Edge polarity input to external interrupt pin (INT3).
selection bit 3 • A value of "0" selects rising edges and "1" selects falling edges.
EIE3: This bit enables or disables an interrupt request output to the CPU. An interrupt
Interrupt request request is output when both this bit and the external interrupt request flag bit 3
enable bit 3 (EIR3) are "1".
• This bit is set to "1" when the edge selected by the edge polarity selection bit 2
(SEL2) is input to an external interrupt pin (INT2).
EIR2:
• An interrupt request is output when both this bit and the interrupt request enable
External interrupt
bit 2 (EIE2) are "1".
request flag bit 2
• Writing "0" clears this bit. Writing "1" has no effect and does not change the bit
value.
• The read value is indeterminate.
Unused bit
• Writing to this bit has no effect on the operation.
SEL2: • This bit selects the edge polarity that triggers interrupts when detected on pulses
Edge polarity input to external interrupt pin (INT2).
selection bit 2 • A value of "0" selects rising edges and "1" selects falling edges.
EIE2: This bit enables or disables an interrupt request output to the CPU. An interrupt
Interrupt request request is output when both this bit and the external interrupt request flag bit 2
enable bit 2 (EIR2) are "1".
CHAPTER 12 EXTERNAL INTERRUPT CIRCUIT (EDGE)
Function
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