SPC572LX datasheet(24/112 Pages) STMICROELECTRONICS

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Electrical characteristics

SPC572Lx

24/112

DocID027866 Rev 5

Note:

Each I/O pin on the device supports specific drive configurations. See the signal description

table in the device reference manual for the available drive configurations for each I/O pin.

3.8.1

I/O input DC characteristics

Table 12 provides input DC electrical characteristics as described in Figure 5.

Figure 5. I/O input DC electrical characteristics definition

Table 11. I/O pad specification descriptions

Pad type

Description

Weak configuration

Provides a good compromise between transition time and low electromagnetic emission.

Pad impedance is centered around 800

Ω.

Medium configuration

Provides transition fast enough for the serial communication channels with controlled

current to reduce electromagnetic emission.

Pad impedance is centered around 200

Ω.

Strong configuration

Provides fast transition speed; used for fast interface.

Pad impedance is centered around 50

Ω.

Very strong configuration Provides maximum speed and controlled symmetric behavior for rise and fall transition.

Used for fast interface including Ethernet interfaces requiring fine control of rising/falling

edge jitter.

Pad impedance is centered around 40

Ω.

Differential configuration

A few pads provide differential capability providing very fast interface together with good

EMC performances.

Input only pads

These low input leakage pads are associated with the ADC channels.

VIL

VIN

VIH

VINTERNAL

VDD

VHYS

(SIUL register)

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