参数资料
型号: T89C51AC2-RLTIM
厂商: Atmel
文件页数: 117/121页
文件大小: 0K
描述: IC 8051 MCU FLASH 32K 44VQFP
标准包装: 160
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-LQFP
包装: 托盘
95
A/T89C51AC2
4127H–8051–02/08
Registers
Table 70. IEN0 Register
IEN0 (S:A8h)
Interrupt Enable Register
Reset Value = 0000 0000b
bit addressable
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 interrupt enable bit.
6
EC
PCA Interrupt Enable
Clear to disable the PCA interrupt.
Set to enable the PCA interrupt.
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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