ST8024

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Figure 2: Pin Configuration

Table 2: Pin Description

PlN N°

SYMBOL

NAME AND FUNCTION

1

CLKDIV1

Control of CLK Frequency

2

CLKDIV2

Control of CLK Frequency

35V/3V

4

PGND

Power Ground for Step-Up converter

5

C1+

External Cap. for Step-Up converter

6

Power Supply for Step-Up converter

7

C1-

External Cap. Step-Up converter

8

Output of Step-Up converter

9PRES

Card Presence Input (Active Low)

10

PRES

Card Presence Input (Active High)

11

I/O

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

12

AUX2

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

13

AUX1

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

14

CGND

Ground for card signal (C5)

15

CLK

Clock to card (C3)

16

RST

Card Reset (C2)

17

Supply Voltage for the card (C1)

18

PORADJ

Deactivation threshold selector pin (under voltage lock-out)

19

CMDVCC

Start activation sequence input (Active Low)

20

RSTIN

Card Reset Input from MCU

21

Supply Voltage

22

GND

Ground

23

OFF

Interrupt to MCU (active Low)

24

XTAL1

Crystal or external clock input

25

XTAL2

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

26

I/OUC

MCU data I/O line (internal 11k

27

AUX1UC

Non-inverting Receiver Input (internal 11k

28

AUX2UC

Non-inverting Receiver Input (internal 11k