UM1613 datasheet(3/9 Pages) STMICROELECTRONICS

3 / 9 page

DocID024287 Rev 1

3/9

UM1613

Description

Figure 2. Demonstration board description

2.1

Use of the demonstration board

The ST8034P 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.

Card supply (VCC) selection switch: the demonstration board provides easy but flexible card

supply voltage selection either by the onboard configuration switch driving the tristate VCC

selection input pin VCC_SEL or by the microcontroller. Put the VCC_SEL switch to the

position “VDD(INTF)” (logic high level) to select VCC = 5 V or “GND” (logic low level) to select

VCC = 3.0 V, see Table 1, or to the center position (“MCU”/floating) which leaves this pin

floating (i.e. selects VCC = 1.8 V) and connects this signal to the microcontroller interface to

allow its control of this input signal if the MCU is connected.

UM1613 数据表(PDF) 3 Page - STMicroelectronics