DocID024208 Rev 1

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UM1607

Description

2

Description

Figure 2. Demonstration board description

2.1

Use of the demonstration board

The ST8034HC 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.

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”).



flexible card supply voltage selection either by the onboard configuration switches or by

the microcontroller. Put the VCC_SEL1 and VCC_SEL2 switches to the position

(5.0 V, 3.0 V or 1.8 V) according to Table 1, or to the center position (“MCU”) which

connects this signal to the microcontroller interface to allow its control of these input

signals.