STM32G474CB datasheet(34/232 Pages) STMICROELECTRONICS

34 / 232 page

Functional overview

STM32G474xB STM32G474xC STM32G474xE

34/232

DS12288 Rev 1

3.21

Comparators (COMP)

The STM32G474xB/xC/xE devices embed seven rail-to-rail comparators with

programmable reference voltage (internal or external), hysteresis.

The reference voltage can be one of the following:

•

External I/O

•

DAC output channels

•

Internal reference voltage or submultiple (1/4, 1/2, 3/4).

All comparators can wake up from Stop mode, generate interrupts and breaks for the timers.

3.22

Operational amplifier (OPAMP)

The STM32G474xB/xC/xE devices embed six operational amplifiers with external or internal

follower routing and PGA capability.

The operational amplifier features:

•

15 MHz bandwidth

•

Rail-to-rail input/output

•

PGA with a non-inverting gain ranging of 2, 4, 8, 16, 32 or 64 or inverting gain ranging

of -1, -3, -7, -15, -31 or -63

3.23

Random number generator (RNG)

All devices embed an RNG that delivers 32-bit random numbers generated by an integrated

analog circuit.

3.24

Timers and watchdogs

The STM32G474xB/xC/xE devices include One High Resolution time, two advanced motor

control timers, up to nine general-purpose timers, two basic timers, one low-power timer,

two watchdog timers and a SysTick timer. The table below compares the features of the

advanced motor control, general purpose and basic timers.

Table 7. Timer feature comparison

Timer type

Timer

Counter

resolution

Counter

type

Prescaler

factor

DMA

request

generation

Capture/

compare

channels

Complementary

outputs

High

resolution

timer

HRTIM

16-bit

/1 /2 /4

(x2 x4 x8 x16

x32, with DLL)

Yes

Advanced

motor

control

TIM1, TIM8,

TIM20

16-bit

Up,

down,

Up/down

Any integer

between 1 and

65536

Yes

General-

purpose

TIM2, TIM5

32-bit

Up,

down,

Up/down

Any integer

between 1 and

65536

Yes

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