参数资料
型号: ST7FLITE09Y0B3
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP16
封装: 0.300 INCH, PLASTIC, DIP-16
文件页数: 43/115页
文件大小: 781K
代理商: ST7FLITE09Y0B3
ST7FLITE0
33/115
INTERRUPTS (Cont’d)
EXTERNAL INTERRUPT CONTROL REGISTER
(EICR)
Read/Write
Reset Value: 0000 0000 (00h)
Bit 7:6 = IS3[1:0]
ei3 sensitivity
These bits define the interrupt sensitivity for ei3
(Port B0) according to Table 8.
Bit 5:4 = IS2[1:0]
ei2 sensitivity
These bits define the interrupt sensitivity for ei2
(Port B3) according to Table 8.
Bit 3:2 = IS1[1:0]
ei1 sensitivity
These bits define the interrupt sensitivity for ei1
(Port A7) according to Table 8.
Bit 1:0 = IS0[1:0]
ei0 sensitivity
These bits define the interrupt sensitivity for ei0
(Port A0) according to Table 8.
Note: These 8 bits can be written only when the I
bit in the CC register is set.
Table 8. Interrupt Sensitivity Bits
.
70
IS31
IS30
IS21
IS20
IS11
IS10
IS01
IS00
ISx1 ISx0
External Interrupt Sensitivity
0
Falling edge & low level
0
1
Rising edge only
1
0
Falling edge only
1
Rising and falling edge
1
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