ST7FOXU0 datasheet(12/123 Pages) STMICROELECTRONICS

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Pin description

ST7FOXU0

12/123

Legend / Abbreviations for Table 2:

Type: I = input, O = output, S = supply

In/Output level:CT= CMOS 0.3VDD/0.7VDD with input trigger

Output level: HS = 20mA high sink (on N-buffer only)

Port and control configuration:

●

Input: float = floating, wpu = weak pull-up, int = interrupt, ana = analog

●

Output: OD = open drain, PP = push-pull

Note:

The RESET configuration of each pin is shown in bold which is valid as long as the device is

in reset state.

Table 2.

Device pin description (8-pin package)

No.

Pin Name

Level

Port / Control

Main

Function

(after

reset)

Alternate Function

Input

Output

1VDD

(1)

Main power supply

PA5/AIN4/

CLKIN

CT HS X

ei4

Port A5

Analog input 4 or External Clock Input

PA4/AIN3/MCO

CT HS X

ei3

Port A4

Analog input 3 or Main clock output

PA3/RESET (2)

Port A3

RESET (2)

PA2/AIN2/LTIC

CT HS X

ei2

Port A2

Analog input 2 or Lite Timer Input

Capture

PA1/AIN1/

ICCCLK

CT HS X

ei1

Port A1

Analog input 1 or In Circuit

Communication Clock

Caution: During normal operation

this pin must be pulled-up, internally

or externally (external pull-up of 10k

mandatory in noisy environment).

This is to avoid entering ICC mode

unexpectedly during a reset. In the

application, even if the pin is

configured as output, any reset will

put it back in pull-up

PA0/AIN0/

ATPWM/

ICCDATA

CT HS X

ei0

Port A0

Analog input 0 or Auto-Reload Timer

PWM or In Circuit Communication

Data

8VSS

(1)

Ground

It is mandatory to connect all available VDD and VDDA pins to the supply voltage and all VSS and VSSA pins to ground.

After a reset, the multiplexed PA3/RESET pin will act as RESET. To configure this pin as output (Port A3), write 55h to

MUXCR0 and AAh to MUXCR1.

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