ST72325AR7B3 datasheet(16/197 Pages) STMICROELECTRONICS

16 / 197 page

ST72325xx

16/197

Notes for Table 2 and Table 3:

1. 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.

2. 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 See “I/O PORTS” on page 50. and Section 12.8 I/O PORT PIN CHARACTER-

ISTICS for more details.

3. OSC1 and OSC2 pins connect a crystal/ceramic resonator, or an external source to the on-chip oscil-

lator; see Section 1 DESCRIPTION and Section 12.5 CLOCK AND TIMING CHARACTERISTICS for

more details.

4. On the chip, each I/O port may have up to 8 pads:

– In all devices except 48-pin ST72325C, pads that are not bonded to external pins are forced by hardware

in input pull-up configuration after reset. The configuration of these pads must be kept at reset state to

avoid added current consumption.

– In 48-pin ST72325C devices, unbonded pads PA0, PA1, PB6, PB7, PD6, PD7, PE3, PE5, PE6, PE7,

PF3 and PF5) are in input floating configuration after reset. To avoid added current consumption, the

application must force these ports in input pull-up state by writing to the OR and DDR registers after re-

set. This initialization is not necessary in 48-pin ST72325S devices.

Pull-up always activated on PE2 see limitation Section 15.1.8.

It is mandatory to connect all available VDD and VREF pins to the supply voltage and all VSS and VSSA

pins to ground.

PB0/PWM3

I/O CT

ei2

Port B0

PWM Output 3

Caution: Negative current injec-

tion not allowed on this pin

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

PD0/AIN0

I/O CT

Port D0

ADC Analog Input 0

PD1/AIN1

I/O CT

Port D1

ADC Analog Input 1

Pin n°

Pin Name

Level

Port

Main

function

(after

reset)

Alternate function

Input

Output

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