ST72324BJ2 datasheet(12/188 Pages) STMICROELECTRONICS

12 / 188 page

Pin description

ST72324B

12/188

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/0.7DD

CT = CMOS 0.3VDD/0.7DD 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(a), ana = analog ports

Output: OD = open drain(b), PP = push-pull

In the interrupt input column, “eiX” defines the associated external interrupt vector. If the weak pull-up column

(wpu) is merged with the interrupt column (int), then the I/O configuration is pull-up interrupt input, else the

configuration is floating interrupt input.

In the open drain output column, ‘T’ defines a true open drain I/O (P-Buffer and protection diode to VDD are not

implemented). See Section 9: I/O ports and Section 12.9: I/O port pin characteristics for more details.

Table 1.

Device pin description

Pin No.

Pin Name

Level

Port

Main

function

(after

reset)

Alternate Function

Input

Output

PB4 (HS)

I/O CT HS

ei3

Port B4

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

VAREF

(1)

Analog Reference Voltage for ADC

VSSA

(1)

Analog Ground Voltage

15 10

PF0/MCO/AIN8

I/O CT

Xei1

Port F0

Main clock

out (fCPU)

ADC

Analog

Input 8

16 11

PF1 (HS)/BEEP I/O CT HS

ei1

Port F1

Beep signal output

17 12

PF2 (HS)

I/O CT HS

ei1

Port F2

18 13

PF4/OCMP1_A/

AIN10

I/O CT

Port F4

Timer A

Output

Compare 1

ADC

Analog

Input 10

19 14

PF6

(HS)/ICAP1_A

I/O CT HS

Port F6

Timer A Input Capture 1

20 15

PF7 (HS)/

EXTCLK_A

I/O CT HS

Port F7

Timer A External Clock

Source

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