1999 Dec 30

5

Philips Semiconductors

Product specification

IC card interface

TDA8004T

PINNING

SYMBOL

PIN

I/O

DESCRIPTION

CLKDIV1

1

I

control with CLKDIV2 for choosing CLK frequency

CLKDIV2

2

I

control with CLKDIV1 for choosing CLK frequency

RFU1

3

I

PGND

4

supply power ground for step-up converter

S2

5

I/O

capacitance connection for step-up converter (a 100 nF capacitor with ESR < 100 m

Ω

must be connected between pins S1 and S2)

6

supply power supply voltage for step-up converter

S1

7

I/O

capacitance connection for step-up converter (a 100 nF capacitor with ESR < 100 m

Ω

must be connected between pins S1 and S2)

VUP

8

I/O

output of step-up converter (a 100 nF capacitor with ESR < 100 m

Ω must be

connected to PGND)

PRES

9

I

card presence contact input (active LOW); if PRES or PRES is true, then the card is

considered as present

PRES

10

I

card presence contact input (active HIGH); if PRES or PRES is true, then the card is

considered as present

I/O

11

I/O

data line to and from card (C7) (internal 10 k

Ω pull-up resistor connected to V

AUX2

12

I/O

auxiliary line to and from card (C8) (internal 10 k

Ω pull-up resistor connected to V

AUX1

13

I/O

auxiliary line to and from card (C4) (internal 10 k

Ω pull-up resistor connected to V

CGND

14

supply ground for card signals

CLK

15

O

clock to card (C3)

RST

16

O

card reset (C2)

17

O

Supply for card (C1); decouple to CGND with 2

× 100 nF or 1 × 100 nF and 1 × 220 nF

capacitors with ESR < 100 m

n.c.

18

−

not connected

CMDVCC

19

I

start activation sequence input from microcontroller (active LOW)

RSTIN

20

I

card reset input from microcontroller (active HIGH)

21

supply supply voltage

GND

22

supply ground

OFF

23

O

NMOS interrupt to microcontroller (active LOW) with 20 k

Ω internal pull-up resistor

XTAL1

24

I

crystal connection or input for external clock

XTAL2

25

O

crystal connection (leave open if an external clock source is used)

I/OUC

26

I/O

microcontroller data I/O line (internal 10 k

Ω pull-up resistor connected to V

AUX1UC

27

I/O

auxiliary line to and from microcontroller (internal 10 k

Ω pull-up resistor connected to

AUX2UC

28

I/O

auxiliary line to and from microcontroller (internal 10 k

Ω pull-up resistor connected to