Datasheet

ST72321Rx ST72321ARx ST72321Jx
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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:
– ads 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.
5. Pull-up always activated on PE2 see limitation Section 15.4.6.
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.