参数资料
型号: AT83C5112
厂商: Atmel Corp.
英文描述: 8-bit Microcontroller with A/D Converter
中文描述: 8位微控制器与A / D转换器
文件页数: 63/97页
文件大小: 1229K
代理商: AT83C5112
63
AT8xC5112
4191B
8051
04/03
Interrupt System
The AT8xC5112 has a total of 8 interrupt vectors: two external interrupts (INT0 and
INT1), two timer interrupts (timers 0, 1), serial port interrupt, PCA, SPI and A/D. These
interrupts are shown in Figure 29.
Figure 29.
Interrupt Control System
Each of the interrupt sources can be individually enabled or disabled by setting or clear-
ing a bit in the Interrupt Enable register (See Table 51). This register also contains a
global disable bit, which must be cleared to disable all interrupts at once.
Each interrupt source can also be individually programmed to one of four priority levels
by setting or clearing a bit in the Interrupt Priority register (See Table 53) and in the
Interrupt Priority High register (See Table 55). Table 49 shows the bit values and priority
levels associated with each combination.
IE1
0
3
High priority
interrupt
Interrupt
polling
sequence
Low priority
interrupt
Global
disable
Individual
enable
TI
RI
TF0
INT0
INT1
TF1
IPH, IP
IE0
0
3
0
3
0
3
0
3
0
3
NC
SPI
0
3
3
ADC
0
0
3
CF
CCFx
PCA
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