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在80C51系列微控制器中运用多达5个的外部中断信号
消耗积分:3 |
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大小:14 |
2009-06-29
吴湛
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80C51 family microcontrollers are equipped
with up to two inputs which may be used as
general-purpose interrupts. A typical device
provides a total of 5 interrupt sources. Timer
0 and Timer 1 generate vectored interrupts,
as does the Serial Port. Applications that
require more than two externally signaled
vectored interrupts, and do not use one or
more of the counters or the serial port, can be
configured to use these facilities for additional
external interrupt inputs.
This note describes a method to configure
the timer/counters and the serial port for use
as interrupt inputs (see Figure 1). Minimum
response time is a goal for this configuration.
with up to two inputs which may be used as
general-purpose interrupts. A typical device
provides a total of 5 interrupt sources. Timer
0 and Timer 1 generate vectored interrupts,
as does the Serial Port. Applications that
require more than two externally signaled
vectored interrupts, and do not use one or
more of the counters or the serial port, can be
configured to use these facilities for additional
external interrupt inputs.
This note describes a method to configure
the timer/counters and the serial port for use
as interrupt inputs (see Figure 1). Minimum
response time is a goal for this configuration.
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