ST7LITE49K2 datasheet(79/245 Pages) STMICROELECTRONICS

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ST7LITE49K2

I/O ports

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10.6

Interrupts

The external interrupt event generates an interrupt if the corresponding configuration is

selected with DDR and OR registers and if the I bit in the CC register is cleared (RIM

instruction).

See application notes AN1045 software implementation of I2C bus master, and AN1048 -

software LCD driver

10.7

Device-specific I/O port configuration

The I/O port register configurations are summarized in Section 10.7.1: Standard ports and

Section 10.7.2: Other ports.

10.7.1

Standard ports

10.7.2

Other ports

Table 27.

Description of interrupt events

Interrupt event

Event flag

Enable

control bit

Exit from

Wait

Exit from

Halt

External interrupt on selected

external event

DDRx

ORx

Yes

Table 28.

PA5:0, PB7:0, PC7:4 and PC2:0 pins

Mode

DDR

floating input

pull-up interrupt input

open drain output

push-pull output

Table 29.

PA7:6 pins

Mode

DDR

floating input

interrupt input

open drain output

push-pull output

Table 30.

PC3 pin

Mode

DDR

floating input

pull-up input

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