Hitachi F-ZTAT H8/3039 Series Hardware Manual page 97

Bit 3—User Bit Enable (UE): Selects whether to use the UI bit in CCR as a user bit or an
interrupt mask bit.
Bit 3
UE Description
0 UI bit in CCR is used as interrupt mask bit
1 UI bit in CCR is used as user bit
Bit 2—NMI Edge Select (NMIEG): Selects the NMI input edge.
Bit 2
NMIEG
0
1
Description
Interrupt is requested at falling edge of NMI input
Interrupt is requested at rising edge of NMI input
(Initial value)
(Initial value)
85