Cypress FM4 Series - External Interrupt Factor Level Register 2 (ELVR2)

CHAPTER 9: External Interrupt and NMI Control Sections
452 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
4.8 External Interrupt Factor Level Register 2 (ELVR2)
The ELVR2 is used to select the both rising and falling edges of the signal detected as an external
interrupt request.
This register is equipped in TYPE5-M4 and TYPe6-M4 products.
Register configuration
bit
31
16
Field
LC31
LC30
LC29
LC28
LC27
LC26
LC25
LC24
LC23
LC22
LC21
LC20
LC19
LC18
LC17
LC16
Attribute
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
bit
15
0
Field
LC15
LC14
LC13
LC12
LC11
LC10
LC9
LC8
LC7
LC6
LC5
LC4
LC3
LC2
LC1
LC0
Attribute
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Register functions
[bit31:0] LC31 to LC0: External interrupt request detection level selection bits
LC31 to LC0 bits correspond to pins INT31 to INT0.
It is prohibited to set the bit corresponding to a pin that is not defined in the product specifications.
If the both rising and falling edges selected with this bit are detected, it is recognized as an external
interrupt request.
LCx
Description
0
Detects the edge or level selected with EVRL and EVRL1.
1
Detects the both rising and falling edges.