參數(shù)資料
型號(hào): AT89C51ID2-SLRIM
廠商: Atmel
文件頁數(shù): 118/157頁
文件大?。?/td> 0K
描述: IC MCU FLASH 8051 64K 5V 44-PLCC
標(biāo)準(zhǔn)包裝: 1
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 60MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲(chǔ)器容量: 64KB(64K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
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: 剪切帶 (CT)
其它名稱: AT89C51ID2SLRIMCT
63
AT89C51ID2
4289C–8051–11/05
Interrupt System
The AT89C51ID2 has a total of 10 interrupt vectors: two external interrupts (INT0 and
INT1), three timer interrupts (timers 0, 1 and 2), the serial port interrupt, SPI interrupt,
Keyboard interrupt and the PCA global interrupt. These interrupts are shown in Figure
Figure 25. Interrupt Control System
Each of the interrupt sources can be individually enabled or disabled by setting or clear-
ing a bit in the Interrupt Enable register (Table 52 and Table 50). This register also
contains a global disable bit, which must be cleared to disable all interrupts at once.
Each interrupt source can also be individually programmed to one out of four priority lev-
els by setting or clearing a bit in the Interrupt Priority register (Table 53) and in the
Interrupt Priority High register (Table 51 and Table 52) shows the bit values and priority
levels associated with each combination.
IE1
0
3
High priority
interrupt
Interrupt
polling
sequence, decreasing from
high to low priority
Low priority
interrupt
Global Disable
Individual Enable
EXF2
TF2
TI
RI
TF0
INT0
INT1
TF1
IPH, IPL
IE0
0
3
0
3
0
3
0
3
0
3
0
3
PCA IT
KBD IT
SPI IT
0
3
0
3
0
3
TWI IT
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