AN2615 datasheet(17/37 Pages) STMICROELECTRONICS

Part #	AN2615

Description	In general the ADC embedded in the ST7 microcontroller

PDF	37 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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17 / 37 page

AN2615

Hardware setup

17/37

Hardware setup

Figure 11.

Hardware setup

The external ADC is interfaced to the ST7 microcontroller The input capture pins PB0 and

PB2 are used for capturing the pulse from the comparators at two instants (when the output

is equal to V2 and V3 respectively), while PB1 and PB3 are used for controlling the voltage

at the gate of the M1 and M2 switches (on/off the MOSFET). The results of the A/D

conversion are displayed on the Windows hyper terminal application through an RS232-SCI

interface. The general schematics of the board are given in Appendix B: Application board

schematics on page 31.

0134.85 mV

Vin

VDD

Comp1

External

ADC

Comp2

PB0

PB1

PB2

PB3

ST72

TD0

Gnd

Application board

RS232 communication

RS232

interface

Hyper terminal

Gnd

Multimeter

VDD

AN2615 Datasheet(PDF) 17 Page - STMicroelectronics