TDA8004AT Datasheet, PDF (5/22 Pages) NXP Semiconductors – IC card interface

Philips Semiconductors
IC card interface
Product specification
TDA8004AT
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
5V/3V
PGND
3
I control signal for selecting V_CC = 5 V (HIGH) or V_CC = 3 V (LOW)
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 mΩ
must be connected between pins S1 and S2)
V_DDP
S1
VUP
6 supply power supply voltage for step-up converter
7
I/O capacitance connection for step-up converter (a 100 nF capacitor with ESR < 100 mΩ
must be connected between pins S1 and S2)
8
O output of step-up converter (a 100 nF capacitor with ESR < 100 mΩ 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
I/O
AUX2
AUX1
CGND
10
I card presence contact input (active HIGH); if PRES or PRES is true, then the card is
considered as present
11 I/O data line to and from card (C7) (internal 10 kΩ pull-up resistor connected to V_CC)
12 I/O auxiliary line to and from card (C8) (internal 10 kΩ pull-up resistor connected to V_CC)
13 I/O auxiliary line to and from card (C4) (internal 10 kΩ pull-up resistor connected to V_CC)
14 supply ground for card signals
CLK
15
O clock to card (C3)
RST
V_CC
n.c.
16
O card reset (C2)
17
O supply for card (C1); decouple to CGND with 2 × 100 nF or 1 × 100nF and 1 × 220 nF
capacitors with ESR < 100 mΩ (with 220 nF, the noise margin on V_CC will be higher)
18
− not connected
CMDVCC 19
I start activation sequence input from microcontroller (active LOW)
RSTIN
20
I card reset input from microcontroller (active HIGH)
V_DD
GND
21 supply supply voltage
22 supply ground
OFF
XTAL1
23
O NMOS interrupt to microcontroller (active LOW) with 20 kΩ internal pull-up resistor
connected to V_DD (refer section “Fault detection”)
24
I crystal connection or input for external clock
XTAL2
25
O crystal connection (leave open circuit if an external clock source is used)
I/OUC
26 I/O microcontroller data I/O line (internal 10 kΩ pull-up resistor connected to V_DD)
AUX1UC 27 I/O auxiliary line to and from microcontroller (internal 10 kΩ pull-up resistor connected to
V_DD)
AUX2UC 28 I/O auxiliary line to and from microcontroller (internal 10 kΩ pull-up resistor connected to
V_DD)
2004 May 10
5