NEC PD754144 - Manual (Page 287)

CHAPTER 11 INSTRUCTION SET
287 User’s Manual U10676EJ3V0UM
11.4.12 Interrupt control instructions
EI
Function: IME (IPS.3) ← 1
Sets the interrupt mask enable flag (bit 3 of the interrupt priority select register) to “1” to enable interrupts.
Acknowledging an interrupt is controlled by an interrupt enable flag corresponding to the interrupt.
EI IE
×××
Function: IE
ЧЧЧ ← 1
ЧЧЧ = N
5 , N 2-0
Sets a specified interrupt enable flag (IE ×××) to “1” to enable acknowledging the corresponding interrupt (××× =
BT, T0, T1, T2, 0, 2, or EE).
DI
Function: IME (IPS.3) ← 0
Resets the interrupt mask enable flag (bit 3 of the interrupt priority select register) to “0” to disable all interrupts,
regardless of the contents of the respective interrupt enable flags.
DI IE
×××
Function: IE ЧЧЧ ← 1 ЧЧЧ = N
5
, N
2-0
Resets a specified interrupt enable flag (IE ×××) to “0” to disable acknowledging the corresponding interrupt (×××
= BT, T0, T1, T2, 0, 2, or EE).