参数资料
型号: AT89C51ID2-SLRIM
厂商: Atmel
文件页数: 119/157页
文件大小: 0K
描述: IC MCU FLASH 8051 64K 5V 44-PLCC
标准包装: 1
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 60MHz
连通性: I²C,SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 64KB(64K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 剪切带 (CT)
其它名称: AT89C51ID2SLRIMCT
64
AT89C51ID2
4289C–8051–11/05
Registers
The PCA interrupt vector is located at address 0033H, the SPI interrupt vector is located
at address 0043H and Keyboard interrupt vector is located at address 004BH. All other
vectors addresses are the same as standard C52 devices.
Table 48. Priority Level Bit Values
A low-priority interrupt can be interrupted by a high priority interrupt, but not by another
low-priority 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 simultaneously, 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.
IPH. x
IPL. x
Interrupt Level Priority
0
0 (Lowest)
011
102
1
3 (Highest)
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