STM32H747AI datasheet(42/252 Pages) STMICROELECTRONICS

42 / 252 page

Functional overview

STM32H747xI/G

32/242

DS12930 Rev 1

The JPEG codec main features are as follows:

•

8-bit/channel pixel depths

•

Single clock per pixel encoding and decoding

•

Support for JPEG header generation and parsing

•

Up to four programmable quantization tables

•

Fully programmable Huffman tables (two AC and two DC)

•

Fully programmable minimum coded unit (MCU)

•

Encode/decode support (non simultaneous)

•

Single clock Huffman coding and decoding

•

Two-channel interface: Pixel/Compress In, Pixel/Compressed Out

•

Support for single greyscale component

•

Ability to enable/disable header processing

•

Fully synchronous design

•

Configuration for High-speed decode mode

3.28

Random number generator (RNG)

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

analog circuit.

3.29

Timers and watchdogs

The devices include one high-resolution timer, two advanced-control timers, ten general-

purpose timers, two basic timers, five low-power timers, two watchdogs and a SysTick timer.

All timer counters can be frozen in Debug mode.

Table 4 compares the features of the advanced-control, general-purpose and basic timers.

Table 4. Timer feature comparison

Timer

type

Timer

Counter

resolution

Counter

type

Prescaler

factor

DMA

request

generation

Capture/

compare

channels

Comple-

mentary

output

Max

interface

clock

(MHz)

Max

timer

clock

(MHz)

(1)

High-

resolution

timer

HRTIM1

16-bit

/1 /2 /4

(x2 x4 x8

x16 x32,

with DLL)

Yes

480

Advanced

-control

TIM1,

TIM8

16-bit

Up,

Down,

Up/down

Any

integer

between 1

and

65536

Yes

120

240

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