ST7FOXK2 datasheet(75/226 Pages) STMICROELECTRONICS

75 / 226 page

ST7FOXF1, ST7FOXK1, ST7FOXK2

I/O ports

75/226

Table 24.

I/O port mode options (1)

Off means implemented not activated, On means implemented and activated.

Configuration mode

Pull-Up

P-Buffer

Diodes

to VDD

to VSS

Input

Floating with/without Interrupt

Off

Pull-up with Interrupt

Output

Push-pull

Off

Open Drain (logic level)

Off

Table 25.

ST7FOXF1/ST7FOXK1/ST7FOXK2 I/O port configuration

Hardware configuration

When the I/O port is in input configuration and the associated alternate function is enabled as an output,

reading the DR register will read the alternate function output status.

When the I/O port is in output configuration and the associated alternate function is enabled as an input,

the alternate function reads the pin status given by the DR register content.

CONDITION

PAD

EXTERNAL INTERRUPT

POLARITY

DATA BUS

INTERRUPT

DR REGISTER ACCESS

FROM

OTHER

PINS

SOURCE (eix)

SELECTION

ALTERNATE INPUT

ANALOG INPUT

To on-chip peripheral

COMBINATIONAL

LOGIC

PAD

DATA BUS

DR REGISTER ACCESS

R/W

PAD

DATA BUS

DR REGISTER ACCESS

R/W

ALTERNATE

ENABLE

OUTPUT

BIT

From on-chip periphera

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