ST8024LACTR Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

ST8024LACTR

Smartcard interface

STMicroelectronics 

Pin configuration

ST8024L

Table 2. Pin description (continued)

Symbol

Name and function

SO-28/

TSSOP-20

TSSOP-28

AUX2

Auxiliary line to and from card (C8)

(internal 11 kΩ pull-up resistor connected to VCC)

12

AUX1 Auxiliary line to and from card (C4) (internal 11 kΩ pull-up resistor to VCC)

13

CGND Ground for card signal (C5)

14

CLK Clock to card (C3)

15

RST Card reset (C2)

16

VCC Supply voltage for the card (C1)

17

PORADJ Power-on reset threshold adjustment input (ST8024LCDR, ST8024LCTR)

1.8 V VCC operation selection. Logic high selects 1.8 V operation and

18

1.8V overrides any setting on the 5V/3V pin. With an internal 11 kΩ pull-down

resistor to GND. (ST8024LACDR, ST8024LACTR and ST8024LTR)

CMDVCC Start activation sequence input (active low)

19

RSTIN Card reset input from MCU

20

VDD Supply voltage

21

GND Ground

22

OFF Interrupt to MCU (active low)

23

XTAL1 Crystal or external clock input

24

XTAL2 Crystal connection (leave this pin open if external clock is used)

25

I/OUC MCU data I/O line (internal 11 kΩ pull-up resistor connected to VDD)

26

AUX1UC Non-inverting receiver input (internal 11 kΩ pull-up resistor connected to VDD)

27

AUX2UC Non-inverting receiver input (internal 11 kΩ pull-up resistor connected to VDD)

28

N. A.

N. A

9

10

11

12

N. A.

13

14

15

16

17

18

19

N.A

20

N. A.

N. A.

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Doc ID 17709 Rev 5

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