NEC V850E/Dx3 Preliminary User's Manual page 219

Interrupt Controller (INTC)
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The NMI and INTP0 share the same pin. The register bits NMIEN, ESEL0,
ESEL01 and ESEL00 configure the NMI and INTP0 interrupt function:
NMIEN ESEL0
0
1
Caution The NMI configuration bits INTM0.NMIEN and INTM0.ESEL0[1:0] can only be
changed if INTM0.NMIEN = 0.
Due to INTM0.NMIEN = 0 after reset the NMI function is disabled and must be
enabled by the application software. Once enabled, the NMI function cannot be
disabled by software.
Specify INTM0.ESEL0[1:0] before or at the same time with setting
INTM0.NMIEN = 1.
Note that INTM0.ESEL0 can be written independently of INTM0.NMIEN.
Preliminary User's Manual U17566EE1V2UM00
ESEL01 ESEL00
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Chapter 5
Function
NMI INTP0
falling edge
rising edge
prohibited
both edges
masked
low level
high level
low level
high level
falling edge falling edge
rising edge rising edge
prohibited prohibited
both edges both edges
falling edge low level
rising edge high level
prohibited low level
both edges high level
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