ST7LITE0X datasheet(32/125 Pages) STMICROELECTRONICS

部件名	ST7LITE0X

功能描述	8-BIT MICROCONTROLLER WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI

PDF	125 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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32 / 125 page

ST7LITE0x, ST7LITESx

32/125

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 7.

Bit 5:4 = IS2[1:0] ei2 sensitivity

These bits define the interrupt sensitivity for ei2

(Port B3) according to Table 7.

Bit 3:2 = IS1[1:0] ei1 sensitivity

These bits define the interrupt sensitivity for ei1

(Port A7) according to Table 7.

Bit 1:0 = IS0[1:0] ei0 sensitivity

These bits define the interrupt sensitivity for ei0

(Port A0) according to Table 7.

Notes:

1. These 8 bits can be written only when the I bit in

the CC register is set.

2. Changing the sensitivity of a particular external

interrupt clears this pending interrupt. This can be

used to clear unwanted pending interrupts. Refer

to section “External interrupt function” on page 43.

Table 7. Interrupt Sensitivity Bits

IS31

IS30

IS21

IS20

IS11

IS10

IS01

IS00

ISx1 ISx0

External Interrupt Sensitivity

Falling edge & low level

Rising edge only

Falling edge only

Rising and falling edge

ST7LITE0X 数据表(PDF) 32 Page - STMicroelectronics

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