Rainbow Electronics AT89LP216 - Manual (Page 20)

20
3621A–MICRO–6/06
AT89LP216 [Preliminary]
Figure 12-1. Minimum Interrupt Response Time
Figure 12-2. Maximum Interrupt Response Time
.
Clock Cycles
INT0
IE0
1 5
Instruction LCALL 1st ISR Instr. Cur. Instr.
Ack.
Clock Cycles
INT0
IE0
1 13
Instruction RETI 4 Cyc. Instr. LCALL 1st ISR In
Ack.
Table 12-2. IE – Interrupt Enable Register
IE = A8H Reset Value = 0000 0000B
Bit Addressable
EA EC EGP ES ET1 EX1 ET0 EX0
Bit 7 6 5 4 3 2 1 0
Symbol Function
EA Global enable/disable. All interrupts are disabled when EA = 0. When EA = 1, each interrupt source is enabled/disabled
by setting /clearing its own enable bit.
EC Comparator Interrupt Enable
EGP General-purpose Interrupt Enable
ES Serial Port Interrupt Enable
ET1 Timer 1 Interrupt Enable
EX1 External Interrupt 1 Enable
ET0 Timer 0 Interrupt Enable
EX0 External Interrupt 0 Enable