ST8024CD datasheet(3/23 Pages) STMICROELECTRONICS

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ST8024

3/23

Figure 2: Pin Configuration

Table 2: Pin Description

PlN 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

VDDP

Power Supply for Step-Up converter

C1-

External Cap. Step-Up converter

VUP

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 11k

Ω pull-up resistor connected to VCC)

AUX2

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

Ω pull-up resistor connected to VCC)

AUX1

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

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)

PORADJ

Deactivation threshold selector pin (under voltage lock-out)

CMDVCC

Start activation sequence input (Active Low)

RSTIN

Card Reset Input from MCU

VDD

Supply Voltage

GND

Ground

OFF

Interrupt to MCU (active Low)

XTAL1

Crystal or external clock input

XTAL2

Crystal connection (leave this pin open if external clock is used)

I/OUC

MCU data I/O line (internal 11k

Ω pull-up resistor connected to VDD)

AUX1UC

Non-inverting Receiver Input (internal 11k

Ω pull-up resistor connected to VDD)

AUX2UC

Non-inverting Receiver Input (internal 11k

Ω pull-up resistor connected to VDD)

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