参数资料
型号: AT89C51ED2-SMSUM
厂商: Atmel
文件页数: 111/137页
文件大小: 0K
描述: IC 8051 MCU FLASH 64K 68PLCC
产品培训模块: MCU Product Line Introduction
标准包装: 304
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 60MHz
连通性: SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 50
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: 68-PLCC
包装: 管件
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
75
4235K–8051–05/08
AT89C51RD2/ED2
Table 17-4.
IPL0 Register
IPL0 - Interrupt Priority Register (B8h)
Reset Value = X000 0000b
Bit addressable
7
6
5
4
3
2
1
0
-
PPCL
PT2L
PSL
PT1L
PX1L
PT0L
PX0L
Bit
Number
Bit
Mnemonic
Description
7
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
6
PPCL
PCA interrupt Priority bit
Refer to PPCH for priority level.
5
PT2L
Timer 2 overflow interrupt Priority bit
Refer to PT2H for priority level.
4
PSL
Serial port Priority bit
Refer to PSH for priority level.
3
PT1L
Timer 1 overflow interrupt Priority bit
Refer to PT1H for priority level.
2
PX1L
External interrupt 1 Priority bit
Refer to PX1H for priority level.
1
PT0L
Timer 0 overflow interrupt Priority bit
Refer to PT0H for priority level.
0
PX0L
External interrupt 0 Priority bit
Refer to PX0H for priority level.
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