tda8004t-c1 NXP Semiconductors, tda8004t-c1 Datasheet - Page 5

• Manufacturer Part Number: tda8004t-c1
• Description: Ic Card Interface
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8. Functional description
TDA8004T_4
Product data sheet
8.1 Power supply
Table 3.
Throughout this document, it is assumed that the reader is familiar with ISO 7816 norm
terminology.
The supply pins for the IC are V
2.7 V to 6.5 V. All interface signals with the system controller are referenced to V
sure the supply voltage of the system controller is also V
inactive during powering up or powering down. The sequencer is not activated until V
reaches V
deactivation of the contacts is performed.
Symbol
PRES
I/O
AUX2
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
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
hys(th2)
Rev. 04 — 20 February 2006
(see
Type
I
I/O
I/O
I/O
supply
O
O
O
-
I
I
supply
supply
O
I
O
I/O
I/O
I/O
…continued
Figure
DD
Description
card presence contact input (active HIGH); if PRES or
PRES is true, then the card is considered as present
data line to and from card (C7) (internal 10 k pull-up
resistor connected to V
auxiliary line to and from card (C8) (internal 10 k pull-up
resistor connected to V
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
Section
crystal connection or input for external clock
crystal connection (leave open 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
100 nF and 1
8.9)
DD
DD
DD
falls below V
should be in the range from
)
220 nF capacitors with ESR < 100 m
CC
CC
CC
DD
)
)
)
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
. All card contacts remain
DD
DD
th2
)
)
, an automatic
CC
TDA8004T
will be higher)
DD
IC card interface
(refer to
100 nF or
DD
; so, be
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DD