Specifications

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 V
DD
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.
5. Pull-up always activated on PE2 see limitation Section 15.1.8.
6. It is mandatory to connect all available V
DD
and V
REF
pins to the supply voltage and all V
SS
and V
SSA
pins to ground.
28 31 PB0/PWM3 I/O C
T
X ei2 X X Port B0
PWM Output 3
Caution: Negative current injec-
tion not allowed on this pin
29 32 PB3/PWM0 I/O C
T
X ei2 X X Port B3 PWM Output 0
30 1 PB4 (HS)/ARTCLK I/O C
T
HS X ei3 X X Port B4 PWM-ART External Clock
31 2 PD0/AIN0 I/O C
T
X X X X X Port D0 ADC Analog Input 0
32 3 PD1/AIN1 I/O C
T
X X X X X Port D1 ADC Analog Input 1
Pin n°
Pin Name
Type
Level Port
Main
function
(after
reset)
Alternate function
LQFP32
DIP32
Input
Output
Input Output
float
wpu
int
ana
OD
PP