参数资料
型号: T89C51AC2-SLSIM
厂商: Atmel
文件页数: 121/121页
文件大小: 0K
描述: IC 8051 MCU FLASH 32K 44PLCC
标准包装: 27
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 5.5 V
数据转换器: A/D 8x10b
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: 管件
99
A/T89C51AC2
4127H–8051–02/08
Table 74. IPH0 Register
IPH0 (B7h)
Interrupt High Priority Register
Reset Value = X000 0000b
7
6
5
4
3
2
1
0
-
PPCH
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
Bit
Number
Bit
Mnemonic Description
7
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
6
PPCH
PCA Interrupt Priority Level Most Significant bit
PPCH
PPC
Priority level
0
Lowest
0
1
0
1
Highest priority
5
PT2H
Timer 2 Overflow Interrupt High Priority bit
PT2H
PT2
Priority Level
0
Lowest
0
1
0
1
Highest
4
PSH
Serial Port High Priority bit
PSH
PS
Priority Level
0
Lowest
0
1
0
1
Highest
3
PT1H
Timer 1 Overflow Interrupt High Priority bit
PT1H
PT1
Priority Level
0
Lowest
0
1
0
1
Highest
2
PX1H
External Interrupt 1 High Priority bit
PX1H
PX1
Priority Level
0
Lowest
0
1
0
1
Highest
1
PT0H
Timer 0 Overflow Interrupt High Priority bit
PT0H
PT0
Priority Level
0
Lowest
0
1
0
1
Highest
0
PX0H
External Interrupt 0 high priority bit
PX0H
PX0
Priority Level
0
Lowest
0
1
0
1
Highest
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