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參數(shù)資料
| 型號： | AT80C51RA2-3CSUM |
| 廠商： | International Rectifier |
| 英文描述： | High Performance 8-bit Microcontroller |
| 中文描述： | 高性能8位微控制器 |
| 文件頁數(shù)： | 41/85頁 |
| 文件大?。?/td> | 762K |
| 代理商： | AT80C51RA2-3CSUM |
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41
4188E–8051–08/06
AT/TS8xC51Rx2
Table 6-16.
Priority Level Bit Values
A low-priority interrupt can be interrupted by a high priority interrupt, but not by another low-prior-
ity interrupt. A high-priority interrupt can’t be interrupted by any other interrupt source.
If two interrupt requests of different priority levels are received simultaneously, the request of
higher priority level is serviced. If interrupt requests of the same priority level are received simul-
taneously, an internal polling sequence determines which request is serviced. Thus within each
priority level there is a second priority structure determined by the polling sequence.
Table 6-17.
IE Register
IE - Interrupt Enable Register (A8h)
Reset Value = 0000 0000b
Bit addressable
IPH.x
IP.x
Interrupt Level Priority
0
0
0 (Lowest)
0
1
1
1
0
2
1
1
3 (Highest)
7
6
5
4
3
2
1
0
EA
EC
ET2
ES
ET1
EX1
ET0
EX0
Bit Number
Bit Mnemonic Description
7
EA
Enable All interrupt bit
Clear to disable all interrupts.
Set to enable all interrupts.
If EA=1, each interrupt source is individually enabled or disabled by setting or
clearing its own interrupt enable bit.
6
EC
PCA interrupt enable bit
Clear to disable . Set to enable.
5
ET2
Timer 2 overflow interrupt Enable bit
Clear to disable timer 2 overflow interrupt.
Set to enable timer 2 overflow interrupt.
4
ES
Serial port Enable bit
Clear to disable serial port interrupt.
Set to enable serial port interrupt.
3
ET1
Timer 1 overflow interrupt Enable bit
Clear to disable timer 1 overflow interrupt.
Set to enable timer 1 overflow interrupt.
2
EX1
External interrupt 1 Enable bit
Clear to disable external interrupt 1.
Set to enable external interrupt 1.
1
ET0
Timer 0 overflow interrupt Enable bit
Clear to disable timer 0 overflow interrupt.
Set to enable timer 0 overflow interrupt.
0
EX0
External interrupt 0 Enable bit
Clear to disable external interrupt 0.
Set to enable external interrupt 0.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AT80C51RA2-RLRUL | 功能描述:8位微控制器 -MCU RLESS RA 40MHZ 3V COM TEMP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| AT80C51RA2-RLSIV | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller |
| AT80C51RA2-RLTCL | 制造商:IRF 制造商全稱:International Rectifier 功能描述:High Performance 8-bit Microcontroller |
| AT80C51RA2-RLTCV | 制造商:IRF 制造商全稱:International Rectifier 功能描述:High Performance 8-bit Microcontroller |
| AT80C51RA2-RLTIM | 制造商:IRF 制造商全稱:International Rectifier 功能描述:High Performance 8-bit Microcontroller |
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