ST ST8034T User manual

June 2013 DocID024224 Rev 1 1/9
UM1608
User manual
16-pin smartcard interfaces ST8034T, ST8034AT demonstration
boards
Introduction
The purpose of this document is to describe, and provide information on, how to efficiently
use the ST8034T and ST8034AT smartcard interface demonstration boards.
The ST8034xx is a family of complete smartcard interface devices, compatible with ISO
7816, NDS and EMV™ 4.3 payment systems that provide selectable supply voltage for the
smartcard with automatic deactivation sequence in case of overload, short-circuit or
undervoltage, with programmable internal or external clock signal, reset signal and
protected I/O data lines. The ST8034HC and ST8034C product variants also provide a chip
select function that allows the device interface to be isolated from the microcontroller bus
signals and to share the bus among multiple card interface devices in a parallel
combination.
In summary, ST8034xx interface devices are placed between the smartcard and the
microcontroller to provide all supply, protection, detection and control functions, with just
minimum external components.
Figure 1. Demonstration board with card connector and microcontroller board interface
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Applications UM1608
2/9 DocID024224 Rev 1
1 Applications
Smartcard readers for
Set-top boxes
Pay-TV
Identification
Tachographs
Banking

DocID024224 Rev 1 3/9
UM1608 Description
9
2 Description
Figure 2. Demonstration board description
2.1 Use of the demonstration board
The ST8034T/AT demonstration board is designed both for standalone operation or to be
fully controlled by the microcontroller; it is fully configurable and provides access to all the
signals including supply voltages through labeled test points and uses a standard connector
for a simple communication interface with the microcontroller block. The labeled test points
on the board are in the same order as the signals in the flat interface cable.
For an easy connection of oscilloscope probes to the test points, remove the plastic tip with
the hook from the probes and insert the center pin into the test point terminal. Ground test
points are available in a sufficient amount throughout the board.
The following blocks provide the demonstration board configurability:
Crystal clock oscillator (10 MHz): can be used to provide card clock in
a standalone operation.
Card clock source selection switch: allows selection between the onboard crystal
oscillator as the card clock source (clock source switch position “Xtal”), or an external
clock source provided by the microcontroller block through the MCU interface together
with the data signals (clock source switch position “Ext”).

Description UM1608
4/9 DocID024224 Rev 1
2.2 Difference between ST8034T and ST8034AT demonstration
boards
The ST8034T and ST8034AT demonstration boards are identical, the only difference is
control of external clock frequency divider, i.e. the response to setting on the CLKDIV input
pin, see Table 1.
Table 1. ST8034T and ST8034AT clock frequency selection
2.3 Smartcard interface
The demonstration board contains a full size smartcard connector. Insert the smartcard from
the right-hand side, card contacts facing down. Card presence detection is implemented
(a presence switch inside the card connector, normally open).
2.4 Interface to a microcontroller block
A standard 16-pin header connector with a standard cable is used to interconnect the
ST8034T/AT demonstration board module with a microcontroller block. The voltage level for
communication on this interface is VDD(INTF).
2.5 Default functionality
No floating pins: for simple standalone testing, all the input signal levels are softly defined by
pull-up or pull-down resistors on the board, refer to Figure 4: Schematic diagram.
CLKDIV pin level
CLK frequency
ST8034T ST8034AT
High fXTAL/2 fXTAL/2
Low fXTAL/4 fXTAL

DocID024224 Rev 1 5/9
UM1608 Board layout
9
3 Board layout
3.1 Layout recommendations
The ST8034xx family of devices includes an LDO block to generate VCC supply voltage for
the smartcard, which (in contrast to previous ST8024/8024L devices with a charge pump)
does not generate any noise and therefore even the requirements for a printed circuit board
layout and external component selection are not so strict (general PCB layout rules apply).
On the other hand, the LDO requires the input voltage (VDDP) to be at least about 100 mV
greater than the desired output voltage (VCC). Place the decoupling capacitors as close as
possible to the appropriate pin of the ST8034 device and use sufficiently wide PCB tracks.
Make the data and clock lines as short as possible and use a ground plane.
3.2 Component placement
Figure 3. Component placement on the PCB

Schematic diagram UM1608
6/9 DocID024224 Rev 1
4 Schematic diagram
Figure 4. Schematic diagram
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DocID024224 Rev 1 7/9
UM1608 Bill of material
9
5 Bill of material
Table 2. Bill of material
Component Value Type Manufacturer Note
U1 Smartcard interface
device
ST8034TDT or
ST8034ATDT STMicroelectronics®SO16 3.9 x 9.9 mm
body package
SC1 Smartcard connector 7434L0825S01LF FCI
J1 Power supply
terminal ARK210/2EX Xinya
J2 Power supply
terminal ARK210/2EX Xinya
J3 Header connector T821116A1R100CEU Amphenol
S1 Clock switch SSSS820201 ALPS
X1 10 MHz Q 10.0-SMU4-30-30 Jauch
R1 100 k0805 Not populated
R2 100 k0805
R3 100 k0805
R4 100 k0805
C1 100 nF 0805
C2 100 nF 0805
C3 100 nF 0805
C4 100 nF 0805
C5 10 µF 0805
C6 220 nF 0805
C7 10 pF 0805
C8 10 pF 0805
Cable connectors 2 x 8 pin / 16-lead T812116A101CEU Amphenol
Cable 16-lead 1-57040-6 TE Connectivity

Revision history UM1608
8/9 DocID024224 Rev 1
6 Revision history
Table 3. Document revision history
Date Revision Changes
03-Jun-2013 1 Initial release.

DocID024224 Rev 1 9/9
UM1608
9
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