ST8024_08 datasheet(6/31 Pages) STMICROELECTRONICS

6 / 31 page

Pin configuration

ST8024

6/31

Pin configuration

Figure 2.

Pin connections

Table 2.

Pin description

Pin n°

Symbol

Name and function

CLKDIV1

Control of CLK frequency

CLKDIV2

Control of CLK frequency

35V/3V

VCC selection pin

PGND

Power ground for step-up converter

C1+

External cap. for step-up converter

6VDDP

Power supply for step-up converter

C1-

External cap. step-up converter

8VUP

Output of step-up converter

9PRES

Card presence input (active low)

PRES

Card presence input (active high)

I/O

Data line to and from card (C7) (internal 11 k

Ω pull-up resistor connected to VCC)

AUX2

Auxiliary line to and from card (C8) (internal 11 k

Ω pull-up resistor connected to VCC)

AUX1

Auxiliary line to and from card (C4) (internal 11 k

Ω pull-up resistor connected to VCC)

CGND

Ground for card signal (C5)

CLK

Clock to card (C3)

RST

Card reset (C2)

VCC

Supply voltage for the card (C1)

VTHSEL

Deactivation threshold selector pin (under voltage lock-out)

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