ST7PMC1M9T6 datasheet(45/309 Pages) STMICROELECTRONICS

No. de pieza	ST7PMC1M9T6

Descripción Electrónicos	8-bit MCU with nested interrupts, Flash, 10-bit ADC, brushless motor control, five timers, SPI, LINSCI?

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INTERRUPTS (Cont’d)

7.6 EXTERNAL INTERRUPTS

The pending interrupts are cleared writing a differ-

ent value in the ISx[1:0], IPA or IPB bits of the

EICR.

Note: External interrupts are masked when an I/O

(configured as input interrupt) of the same inter-

rupt vector is forced to VSS.

7.6.1 I/O PORT INTERRUPT SENSITIVITY

The external interrupt sensitivity is controlled by

the IPA, IPB and ISxx bits of the EICR register

(Figure 24). This control allows to have up to 4 fully

independent external interrupt source sensitivities.

Each external interrupt source can be generated

on four (or five) different events on the pin:

■ Falling edge

■ Rising edge

■ Falling and rising edge

■ Falling edge and low level

■ Rising edge and high level (only for ei0 and ei2)

To guarantee correct functionality, the sensitivity

bits in the EICR register can be modified only

when the I1 and I0 bits of the CC register are both

set to 1 (level 3).

1

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