ST72321 datasheet(10/185 Pages) STMICROELECTRONICS

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ST72321

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PIN DESCRIPTION (Cont’d)

For external pin connection guidelines, refer to See “ELECTRICAL CHARACTERISTICS” on page 136.

Legend / Abbreviations for Table 1:

Type:

I = input, O = output, S = supply

Input level:

A = Dedicated analog input

In/Output level: C = CMOS 0.3VDD/0.7VDD

CT= CMOS 0.3VDD/0.7VDD with input trigger

TT= TTL 0.8V / 2V with Schmitt trigger

Output level:

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

Port and control configuration:

– Input:

float = floating, wpu = weak pull-up, int = interrupt 1), ana = analog

– Output:

OD = open drain 2), PP = push-pull

Refer to “I/O PORTS” on page 46 for more details on the software configuration of the I/O ports.

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. Device Pin Description

Pin n°

Pin Name

Level

Port

Main

function

(after

reset)

Alternate function

Input

Output

PE4 (HS)

I/O CT HS

Port E4

PE5 (HS)

I/O CT HS

Port E5

PE6 (HS)

I/O CT HS

Port E6

PE7 (HS)

I/O CT HS

Port E7

PB0/PWM3

I/O CT

Port B0

PWM Output 3

PB1/PWM2

I/O CT

Port B1

PWM Output 2

PB2/PWM1

I/O CT

Port B2

PWM Output 1

PB3/PWM0

I/O CT

ei2

Port B3

PWM Output 0

PB4 (HS)/ARTCLK

I/O CT HS

ei3

Port B4

PWM-ART External Clock

PB5 / ARTIC1

I/O CT

ei3

Port B5

PWM-ART Input Capture 1

PB6 / ARTIC2

I/O CT

ei3

Port B6

PWM-ART Input Capture 2

PB7

I/O CT

ei3

Port B7

PD0/AIN0

I/O CT

Port D0

ADC Analog Input 0

PD1/AIN1

I/O CT

Port D1

ADC Analog Input 1

PD2/AIN2

I/O CT

Port D2

ADC Analog Input 2

PD3/AIN3

I/O CT

Port D3

ADC Analog Input 3

PD4/AIN4

I/O CT

Port D4

ADC Analog Input 4

PD5/AIN5

I/O CT

Port D5

ADC Analog Input 5

PD6/AIN6

I/O CT

Port D6

ADC Analog Input 6

PD7/AIN7

I/O CT

Port D7

ADC Analog Input 7

VAREF

Analog Reference Voltage for ADC

VSSA

Analog Ground Voltage

VDD_3

Digital Main Supply Voltage

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