Rainbow Electronics AT89LP216 User Manual
Page 20
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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