HD643303x Hitachi, HD643303x Datasheet - Page 94

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

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
0
1
Bit 2—NMI Edge Select (NMIEG): Selects the NMI input edge.
Bit 2
NMIEG
0
1
5.2.2 Interrupt Priority Registers A and B (IPRA, IPRB)
IPRA and IPRB are 8-bit readable/writable registers that control interrupt priority.
UI bit in CCR is used as interrupt mask bit
UI bit in CCR is used as user bit
Interrupt is requested at falling edge of NMI input
Interrupt is requested at rising edge of NMI input
Description
Description
79
(Initial value)
(Initial value)