CHAPTER 16 INTERRUPT FUNCTIONS
Preliminary User’s Manual U16315EJ1V0UD
332
(4) External interrupt rising edge enable register (EGP), external interrupt falling edge enable register (EGN)
These registers specify the valid edge for INTP0 to INTP6.
EGP and EGN are set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears these registers to 00H.
Figure 16-5. Format of External Interrupt Rising Edge Enable Register (EGP)
and External Interrupt Falling Edge Enable Register (EGN)
Address: FF48H After reset: 00H R/W
Symbol
7
6
5
4
3
2
1
0
EGP
0
EGP6
EGP5
EGP4
EGP3
EGP2
EGP1
EGP0
Address: FF49H After reset: 00H R/W
Symbol
7
6
5
4
3
2
1
0
EGN
0
EGN6
EGN5
EGN4
EGN3
EGN2
EGN1
EGN0
EGPn
EGNn
INTPn pin valid edge selection (n = 0 to 6)
0
0
Interrupt disabled
0
1
Falling edge
1
0
Rising edge
1
1
Both rising and falling edges
Table 16-3 shows the ports corresponding to EGPn and EGNn.
Table 16-3. Ports Corresponding to EGPn and EGNn
Detection Enable Register
Edge Detection Port
Interrupt Request Signal
EGP0
EGN0
P120
INTP0
EGP1
EGN1
P30
INTP1
EGP2
EGN2
P31
INTP2
EGP3
EGN3
P32
INTP3
EGP4
EGN4
P33
INTP4
EGP5
EGN5
P16
INTP5
EGP6
EGN6
P140
INTP6