DocID024329 Rev 1

3/8

UM1615

Description

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2.1

Use of the demonstration board

The ST8034C 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.

2.2

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).

2.3

Interface to a microcontroller block

A standard 16-pin header connector with a standard cable is used to interconnect the

ST8034C demonstration board module with a microcontroller block. The voltage level for

2.4

Default functionality notes



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.



R1 and R2 to 1.5 V typ. The resistors can be replaced with different values to set

For detailed specifications of the voltage threshold values, refer to Table 7 of the

ST8034C datasheet.

The sum of R1 + R2 should be about 100 k

, which is a good compromise between

a sufficient robustness and a minimum current consumption.

Please consider tolerance ranges of the resistors used in the resistor divider and

voltage range (i.e. consider also voltage supply tolerance range).