External Interrupt Control Register (Eic00) - Fujitsu F2MC-8FX Hardware Manual

CHAPTER 18 EXTERNAL INTERRUPT CIRCUIT
18.4.1

External Interrupt Control Register (EIC00)

The external interrupt control register (EIC00) is used to select the edge polarity for the
external interrupt input and control interrupts.
External Interrupt Control Register (EIC00)
Address
0048 EIC00
H
0049 EIC10
H
004A EIC20
H
004B EIC30
H
004C EIC01
H
004D EIC11
H
R/W : Readable/writable (Read value is the same as write value)
R(RM1),W : Readable/writable (Read value is different from write value, "1" is read by read-modfy-write instruction)
: Initial value
308
Figure 18.4-2 External Interrupt Control Register (EIC00)
bit7 bit6 bit5
EIR1 SL11 SL10
R(RM1),W
R/W R/W
bit4 bit3 bit2
EIE1 EIR0 SL01 SL00
R(RM1),W
R/W R/W R/W
EIE0
Interrupt request enable bit 0
0
Disables output of interrupt request
1
Enables output of interrupt request
SL01 SL00
0 0
0 1
1 0
1 1
External interrupt request flag bit 0
EIR0
Read
0
Specified edge not inputted
1
Specified edge inputted
EIE1
Interrupt request enable bit 1
0
Disables output of interrupt request
1
Enables output of interrupt request
SL11 SL10
0 0
0 1
1 0
1 1
External interrupt request flag bit 1
EIR1
Read
0
Specified edge not inputted
1
Specified edge inputted
bit1 bit0 Initial value
EIE0 00000000
R/W
Edge polarity select bits 0
No edge detection
Rising edge
Falling edge
Both edges
Write
Clears this bit
No change, no effect on others
Edge polarity select bits 1
No edge detection
Rising edge
Falling edge
Both edges
Write
Clears this bit
No change, no effect on others