參數(shù)資料
型號: T89C51AC2-SLSIM
廠商: Atmel
文件頁數(shù): 117/121頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 32K 44PLCC
標(biāo)準(zhǔn)包裝: 27
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
EEPROM 大小: 2K x 8
RAM 容量: 1.25K x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
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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