Figure 2.
STEVAL-PLC001V1 functional block diagram
GPIO
opto
STM32F746ZG
Arm Cortex-M7 MCU with 1 Mbyte of
Flash memory, 216 MHz CPU
32.768kHz
xstal
(RTC)
25 MHz
Oscill.
SDRAM
128Mb 166Mz
CLT03-2Q3
2-ch self-
powered
SWD connector
10-pin connector
USART connector
USB micro – AB
Demo mode
Morpho connector
2x38 strip male conn.
3.5 inches LCD
TouchGFX
ISO8200AQ
8-channel isolated HS
IPS4260L
4-channel LS
12 industrial output Screw connector
CLT03-38SQ7
8-channel high-speed
SPI
GPIO
opto
SPI
Isolator
GPIO
opto
SPI2
12 industrial input Screw connector
STL42P6LLF6
P-channel MOSFET
24 V
DC
LDK220
200mA
LDO
5 V
, 3.3 V
STLD40DPUR
Backlight LED driver
Current mode Step up
Converter
CLT03-2Q3
2-ch self-
powered
Prote Filter
Various ICs
Non ST and
passive
components
LTDC (RGB)+
I2C
SPI
FLASH
1 MB
DC-DC
converter
Isolated
FMC
SPI
The main blocks are:
•
microcontroller;
•
twelve industrial inputs managed through the eight-channel
mounted twice;
•
twelve industrial outputs on the bottom handled by other two dedicated ICs: the eight-channel
The architecture also includes a 3.5” TFT display powered by the TouchGFX graphics engine for great flexibility in
industrial IO management, giving abstraction from the hardware on one side, and full featured use of the ICs on
the other side.
The morpho connectors allow connecting expansion boards and the USB connector allows supplying the board in
case a 24 V power supply is not available.
Note:
When powered through the USB port, the
has limited functionalities, as it works in demo
mode, allowing display management and programming features but not high current rates on the industrial IOs.
A screw connector in the bottom-left corner is provided to power the board. All other isolated and logic supply
voltages derive from this 24 V input after appropriate conditioning.
A P-channel MOSFET ensures reverse polarity protection, while other ICs are for EMI and surge protections.
A screw connector in the bottom-right corner powers field side devices.
UM2933
Hardware architecture
UM2933
-
Rev 1
page 4/42