ST72344S2 datasheet(20/247 Pages) STMICROELECTRONICS

20 / 247 page

Pin description

ST72344xx, ST2345xx

20/247

Doc ID 12321 Rev 6

Legend / Abbreviations for Table 3:

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 = 20 mA 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 input 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 3.

Device pin description

Pin n°

Pin name

Level

Port

Main

function

(after

reset)

Alternate function

Input (1)

Output

113 14 VDDA

(2)

Analog supply voltage

214 15 VSSA

(2)

Analog ground voltage

15 16 PF0/MCO/AIN8

I/O CT

Xei1

Port F0

Main clock

out

(fOSC/2)

ADC

analog

input 8

16 17 PF1 (HS)/BEEP

I/O CT HS X

ei1

Port F1

Beep signal output

-17 18 PF2 (HS) (3)

I/O CT HS X

ei1

Port F2

18 19 PF4/OCMP1_A/AIN10

I/O CT

Port F4

Timer A

output

compare 1

ADC

analog

input 10

19 20 PF6 (HS)/ICAP1_A

I/O CT HS X

Port F6

Timer A Input

Capture 1

20 21 PF7 (HS)/EXTCLK_A

I/O CT HS X

Port F7

Timer A external

clock source

-21 22 VDD_0

(2)

Digital main supply voltage

-22 23 VSS_0

(2)

Digital ground voltage

23 24 PC0/OCMP2_B/AIN12

I/O CT

Port C0

Timer B

output

compare 2

ADC

analog

input 12

24 27 PC1/OCMP1_B/AIN13

I/O CT

Port C1

Timer B

output

compare 1

ADC

analog

input 13

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