ST7LITE20F2 datasheet(15/166 Pages) STMICROELECTRONICS

15 / 166 page

ST7LITE20F2 ST7LITE25F2 ST7LITE29F2

Pin description

Doc ID 8349 Rev 5

15/166

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 2.

Device pin description

No.

Pin name

Level

Port / Control

Main

function

(after

reset)

Alternate function

Input

Output

OD PP

116 VSS

−

−−

−

− Ground

217 VDD

−

−−

−

− Main power supply

18 RESET

I/O CT

−− X −−

−

Top priority non maskable interrupt (active

low)

19 PB0/AIN0/SS

I/O

ei3

Port B0

ADC analog input 0 or SPI Slave

Select (active low)(1)

20 PB1/AIN1/SCK

I/O

Port B1

ADC analog input 1 or SPI Serial

Clock(1)

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 external

clock input

PB5/AIN5

I/O

Port B5

ADC analog input 5

10 5

PB6/AIN6

I/O

Port B6

ADC analog input 6

11 6

PA7

I/O CT HS X

ei1

−

Port A7

−

12 7

PA6 /MCO/

ICCCLK/BREAK

I/O

Xei1

−

Port A6

Main clock output or in circuit

communication clock or external

BREAK(2)

13 8

PA5 /ATPWM3/

ICCDATA

I/O CT HS X

ei1

−

Port A5

Auto-reload timer PWM3 or In

circuit communication data

14 9

PA4/ATPWM2

I/O CT HS X

−

Port A4

Auto-reload timer PWM2

15 10 PA3/ATPWM1

I/O CT HS X

ei0

−

Port A3

Auto-reload timer PWM1

16 11 PA2/ATPWM0

I/O CT HS X

−

Port A2

Auto-reload timer PWM0

17 12 PA1/ATIC

I/O CT HS X

−

Port A1

Auto-reload timer input capture

18 13 PA0/LTIC

I/O CT HS X

−

Port A0

Lite timer input capture

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