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8.14
电源监控功½
............................................................................................................................................. 25
8.14.1
掉电检测..............................................................................................................................................
26
8.14.2
上电检测..............................................................................................................................................
26
8.15
节电模式.....................................................................................................................................................
26
8.15.1
空闲模式..............................................................................................................................................
26
8.15.2
掉电模式..............................................................................................................................................
26
8.15.3
完全掉电模式......................................................................................................................................
26
8.16
复½.............................................................................................................................................................
26
8.16.1
复½向量..............................................................................................................................................
27
8.17
定时器/计数器
0
和
1 .............................................................................................................................. 27
8.17.1
模式
0................................................................................................................................................... 27
8.17.2
模式
1................................................................................................................................................... 27
8.17.3
模式
2................................................................................................................................................... 27
8.17.4
模式
3................................................................................................................................................... 28
8.17.5
模式
6................................................................................................................................................... 28
8.17.6
定时器溢出触发输出..........................................................................................................................
28
8.18实时时钟/系统定时器......................................................................................................................................... 28
8.19 CCU(P89LPC935/936)........................................................................................................................... 28
8.19.1 CCU
时钟( CCUCLK )
..................................................................................................................... 28
8.19.2 CCU
时钟预分频..................................................................................................................................
28
8.19.3
基本定时器操½..................................................................................................................................
28
8.19.4
输出比较..............................................................................................................................................
29
8.19.5
输入捕获..............................................................................................................................................
29
8.19.6 PWM
操½
............................................................................................................................................ 29
8.19.7
交替输出模式......................................................................................................................................
30
8.19.8 PLL
的操½
.......................................................................................................................................... 30
8.19.9 CCU
中断
............................................................................................................................................. 30
8.20 UART........................................................................................................................................................... 31
8.20.1
模式
0................................................................................................................................................... 31
8.20.2
模式
1................................................................................................................................................... 31
8.20.3
模式
2................................................................................................................................................... 31
8.20.4
模式
3................................................................................................................................................... 31
8.20.5
波特率发生器及选择..........................................................................................................................
31
8.20.6
帧错误..................................................................................................................................................
32
8.20.7
间隔检测..............................................................................................................................................
32
8.20.8
双缓冲..................................................................................................................................................
32
8.20.9
双缓冲½½时发送中断(模式
1,2
和
3) ..................................................................................... 32
8.20.10
双缓冲中的第
9
½(½
8)数据(模式 1,2
和
3)..................................................................... 32
8.21 I
2
C
总线接口
............................................................................................................................................... 32
8.22 SPI................................................................................................................................................................ 33
8.22.1
典型的
SPI
配½
.................................................................................................................................. 34
8.23
模拟比较器
................................................................................................................................................. 35
8.23.1
内部参考电压......................................................................................................................................
36
8.23.2
比较器中断...........................................................................................................................................
36
2