STM32F302XD datasheet(24/168 Pages) STMICROELECTRONICS

24 / 168 page

Functional overview

STM32F302xD STM32F302xE

24/168

DocID026900 Rev 4

•

External triggers for conversion

•

Input voltage reference VREF+

3.16

Operational amplifier (OPAMP)

The STM32F302xD/E embed two operational amplifiers (OPAMP1 and OPAMP2) with

external or internal follower routing and PGA capability (or even amplifier and filter capability

with external components). When an operational amplifier is selected, an external ADC

channel is used to enable output measurement.

The operational amplifier features:

•

8.2 MHz bandwidth

•

0.5 mA output capability

•

Rail-to-rail input/output

•

In PGA mode, the gain is programmed to be 2, 4, 8 or 16.

3.17

Ultra-fast comparators (COMP)

The STM32F302xD/E devices embed four ultra-fast rail-to-rail comparators (COMP1, 2, 4,

6) with programmable reference voltage (internal or external) and selectable output polarity.

The reference voltage can be one of the following:

•

External I/O

•

DAC output pin

•

Internal reference voltage or submultiple (1/4, 1/2, 3/4). Refer to Table 23: Embedded

internal reference voltage for the value and precision of the internal reference voltage.

All comparators can wake up from STOP mode, generate interrupts and breaks for the

timers.

3.18

Timers and watchdogs

The STM32F302xD/E include one advanced control timer, up to six general-purpose timers,

one basic timer, two watchdog timers and one SysTick timer. The table below compares the

features of the advanced control, general purpose and basic timers.

Table 5. Timer feature comparison

Timer type

Timer

Counter

resolution

Counter

type

Prescaler

factor

DMA

request

generation

Capture/

compare

channels

Complementary

outputs

Advanced

TIM1

16-bit

Up, Down,

Up/Down

Any integer

between 1

and 65536

Yes

General-

purpose

TIM2

32-bit

Up, Down,

Up/Down

Any integer

between 1

and 65536

Yes

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