ST7LITE25 datasheet(7/131 Pages) STMICROELECTRONICS

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ST7LITE2

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PIN DESCRIPTION (Cont’d)

Legend / Abbreviations for Table 1:

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

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

Table 1. Device Pin Description

Pin No.

Pin Name

Level

Port / Control

Main

Function

(after reset)

Alternate Function

Input

Output

116

VSS

Ground

217

VDD

Main power supply

RESET

I/O CT

Top priority non maskable interrupt (active

low)

PB0/AIN0/SS

I/O

ei3

Port B0

ADC Analog Input 0 or SPI

Slave Select (active low)

PB1/AIN1/SCK

I/O

Port B1

ADC Analog Input 1 or SPI Se-

rial Clock

PB2/AIN2/MISO

I/O

Port B2

ADC Analog Input 2 or SPI

Master In/ Slave Out Data

PB3/AIN3/MOSI

I/O

ei2

Port B3

ADC Analog Input 3 or SPI

Master Out / Slave In Data

PB4/AIN4/CLKIN

I/O

Port B4

ADC Analog Input 4 or Exter-

nal clock input

PB5/AIN5

I/O

Port B5

ADC Analog Input 5

PB6/AIN6

I/O

Port B6

ADC Analog Input 6

PA7

I/O CT HS

ei1

Port A7

PA6 /MCO/

ICCCLK/BREAK

I/O

ei1

Port A6

Main Clock Output or In Circuit

Communication Clock or Ex-

ternal BREAK

Caution: During reset, this pin

must be held at high level to

avoid entering ICC mode un-

expectedly (this is guaranteed

by the internal pull-up if the ap-

plication leaves the pin float-

ing).

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