ST72681

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PIN DESCRIPTION (Cont’d)

Legend / Abbreviations for tables:

Type:

I = input, O = output, S = supply

Input level:

A = Dedicated analog input

Output level:

D8 = 8mA drive

D4 = 4mA drive

D2 = 2mA drive

Port and control configuration:

– Input:

float = floating, wpu = weak pull-up, wpd = weak pull-down, int = interrupt

– Output:

OD = pseudo open drain, PP = push-pull

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

in reset state.

Table 1. Power Supply

Table 2. Control & System

Pin

Pin Name

Description

48

VSS_1

S

Ground

47

VDD33_1

S

IOs and Regulator supply voltage

33

VSS_2

S

Ground

32

VDD33_2

S

IOs and Regulator supply voltage

25

VSS_3

S

Ground

24

VDD33_3

S

IOs and Regulator supply voltage

14

VSS_4

S

Ground

15

VDD33_4

S

IOs and Regulator supply voltage

13

VDDOUSB

S

USB2 PHY, OSC and PLL power supply output (1.8V)

Pin

Pin Name

Level

Description

29

RESET

Reset input with filter with internal pull-up