SPC56EC74L7 datasheet(18/118 Pages) STMICROELECTRONICS

18 / 118 page

Package pinouts and signal descriptions

SPC564Bxx - SPC56ECxx

18/118

Doc ID 17478 Rev 4

3.2

System pins

The system pins are listed in Table 4.

3.3

Functional ports

The functional port pins are listed in Table 5.

See the I/O pad electrical characteristics in the device datasheet for details.

All medium and fast pads are in slow configuration by default at reset and can be configured as fast or medium.

For example, Fast/Medium pad will be Medium by default at reset. Similarly, Slow/Medium pad will be Slow by

default. Only exception is PC[1] which is in medium configuration by default (refer to PCR.SRC in the reference

manual, Pad Configuration Registers (PCR0—PCR198)).

Table 4.

System pin descriptions

Port pin

Function

I/O

direction

Pad

type

RESET

config.

Pin number

RESET

Bidirectional reset with Schmitt-Trigger

characteristics and noise filter.

I/O

Input, weak

pull-up only

after

PHASE2

EXTAL

Analog input of the oscillator amplifier

circuit. Needs to be grounded if oscillator

bypass mode is used.

IA(1)

—58

XTAL

Analog output of the oscillator amplifier

circuit, when the oscillator is not in bypass

mode.

Analog input for the clock generator when

the oscillator is in bypass mode.

I/O

A(1)

—56

For analog pads, it is not recommended to enable IBE if APC is enabled to avoid extra current in middle range voltage.

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