参数资料
型号: T89C51AC2-SLSIM
厂商: Atmel
文件页数: 115/121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
93
A/T89C51AC2
4127H–8051–02/08
Interrupt System
Introduction
The controller has a total of 8 interrupt vectors: two external interrupts (INT0 and INT1),
three timer interrupts (Timers 0, 1 and 2), a serial port interrupt, a PCA, a timer overrun
interrupt and an ADC. These interrupts are shown below.
Figure 49. Interrupt Control System
EX0
IEN0.0
00
01
10
11
External
Interrupt 0
INT0#
EX1
IEN0.2
External
Interrupt 1
INT1#
ET0
IEN0.1
Timer 0
EC
IEN0.6
PCA
ET1
IEN0.3
Timer 1
ES
IEN0.4
UART
EADC
IEN1.1
A to D
Converter
Interrupt Enable
Lowest Priority Interrupts
Highest
Priority Enable
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
Priority
Interrupts
AIN1:0
Timer 2
00
01
10
11
ET2
IEN0.5
TxD
RxD
CEX0:5
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