ST72340 datasheet(8/191 Pages) STMICROELECTRONICS

8 / 191 page

ST72340, ST72344, ST72345

8/191

PIN DESCRIPTION (Cont’d)

For external pin connection guidelines, refer to See “ELECTRICAL CHARACTERISTICS” on page 152.

Legend / Abbreviations for Table 1:

Type:

I = input, O = output, S = supply

Input level:

A = Dedicated analog input

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 1), ana = analog

– Output:

OD = open drain 2), 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.

On the chip, each I/O port may have up to 8 pads. Pads that are not bonded to external pins are set in in-

put pull-up configuration after reset through the option byte Package selection. The configuration of these

pads must be kept at reset state to avoid added current consumption.

Table 1. Device Pin Description

Pin n°

Pin Name

Level

Port

Main

function

(after

reset)

Alternate Function

Input

Output

113 14

VDDA

Analog Supply Voltage

214 15

VSSA

Analog Ground Voltage

315 16

PF0/MCO/

AIN8

I/O CT

ei1

Port F0

Main clock out

(fOSC/2)

ADC Analog

Input 8

416 17

PF1 (HS)/

BEEP

I/O CT HS

ei1

Port F1

Beep signal output

17 18

PF2 (HS)

I/O CT HS

ei1

Port F2

518 19

PF4/

OCMP1_A/

AIN10

I/O CT

Port F4

Timer A Output

Compare 1

ADC Analog

Input 10

619 20

PF6 (HS)/

ICAP1_A

I/O CT HS

Port F6

Timer A Input Capture 1

720 21

PF7 (HS)/

EXTCLK_A

I/O CT HS

Port F7

Timer A External Clock Source

-21 22

VDD_0

Digital Main Supply Voltage

-22 23

VSS_0

Digital Ground Voltage

823 24

PC0/

OCMP2_B/

AIN12

I/O CT

Port C0

Timer B Output

Compare 2

ADC Analog

Input 12

924 27

PC1/

OCMP1_B/

AIN13

I/O CT

Port C1

Timer B Output

Compare 1

ADC Analog

Input 13

10 25 28

PC2 (HS)/

ICAP2_B

I/O CT HS

Port C2

Timer B Input Capture 2

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