tda8004at-c1 NXP Semiconductors, tda8004at-c1 Datasheet - Page 5

• Manufacturer Part Number: tda8004at-c1
• Description: Ic Card Interface
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8. Functional description
TDA8004AT_3
Product data sheet
8.1 Power supply
Table 3.
Throughout this document, it is assumed that the reader is familiar with ISO7816 norm
terminology.
The supply pins for the IC are V
to 6.5 V. All interface signals with the microcontroller are referenced to V
sure the supply voltage of the microcontroller is also at V
inactive during powering up or powering down. The sequencer is not activated until V
reaches V
deactivation of the contacts is performed.
For generating a 5 V
incorporated. This step-up converter should be separately supplied by V
(from 4.5 V to 6.5 V). Due to large transient currents, the 2
step-up converter should have an ESR of less than 100 m , and be located as near as
possible to the IC.
The supply voltages V
Symbol
AUX1
CGND
CLK
RST
V
n.c.
CMDVCC
RSTIN
V
GND
OFF
XTAL1
XTAL2
I/OUC
AUX1UC
AUX2UC
CC
DD
th2
Pin description
+ V
Pin
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
hys(th2)
Rev. 03 — 9 February 2006
DD
5 % V
(see
and V
Type
I/O
supply
O
O
O
-
I
I
supply
supply
O
I
O
I/O
I/O
I/O
…continued
Figure
CC
DDP
DD
supply to the card, an integrated voltage doubler is
Description
auxiliary line to and from card (C4) (internal 10 k pull-up
resistor connected to V
ground for card signals
clock to card (C3)
card reset (C2)
supply for card (C1); decouple to CGND with 2
1
(with 220 nF, the noise margin on V
not connected
start activation sequence input from microcontroller (active
LOW)
card reset input from microcontroller (active HIGH)
supply voltage
ground
NMOS interrupt to microcontroller (active LOW) with 20 k
internal pull-up resistor connected to V
crystal connection or input for external clock
crystal connection (leave open circuit if an external clock
source is used)
microcontroller data I/O line (internal 10 k pull-up resistor
connected to V
auxiliary line to and from microcontroller (internal 10 k
pull-up resistor connected to V
auxiliary line to and from microcontroller (internal 10 k
pull-up resistor connected to V
and GND. V
3). When V
may be applied to the IC in any time sequence.
100 nF and 1
DD
DD
DD
falls below V
should be in the range from 2.7 V
)
220 nF capacitors with ESR < 100 m
CC
DD
)
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
. All card contacts remain
100 nF capacitors of the
DD
DD
th2
)
)
TDA8004AT
, an automatic
CC
will be higher)
DD
IC card interface
(refer
DD
DDP
; therefore be
and PGND
Section
100 nF or
5 of 25
8.9)
DD