STEVAL-ILL025V1 STMicroelectronics, STEVAL-ILL025V1 Datasheet - Page 7

• Manufacturer Part Number: STEVAL-ILL025V1
• Description: LED MATRIX DISPLAY PANEL
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ILL025V1

• Design Resources: STEVAL-ILL025V1 BOM STEVAL-ILL025V1 Schematic
• Accessory Type: Daughter Board
• Description/function: LED Demo System Display Unit
• Product: Display Modules
• Software: Software Included
• For Use With/related Products: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-9087

UM0767
2
2.1
2.1.1
Note:
System description
This STM32-based display demo system has a microcontroller-based control unit and an
LED driver-based display unit. The control unit is used for configuring the display driver and
the display unit is used for controlling the LED display in accordance with the configuration
received from the control unit.
Description of the STEVAL-ILL024V1 microcontroller-based
control unit
The STEVAL-ILL024V1 control unit is an STM32 microcontroller-based board. This board
has interfaces for:
This microcontroller-based unit is used to control the display board. This unit can be
configured to operate as the master (responsible for sending the commands for display
control) or as the slave unit (responsible for receiving the commands and executing them on
the display unit). In every system, one control unit acts as a master.
Address configuration of the control unit
Each control unit has 8 switches (SW2). These switches are used to configure the address
for the control unit.
Address configuration for the control unit is done by moving the switches to either high or
low positions.
Eight I/O lines are used for address allocation to the control unit. Therefore, up to 255
addresses can be assigned to any control board. The board can have any number of
addresses between 0 and 255.
If the switch is slid towards the numbered side, then logic '1' is assigned to the port, if the
switch is slid towards the “on” side, then logic '0' is assigned to the board.
Whenever the board is powered-up and is connected as a slave unit then its address is
displayed on the LCD mounted on-board.
Address 255 is hardcoded to the master unit and no slave unit is allowed to have this
address. Therefore, one should never slide all 8 switches to the numbered side (opposite
the side where “on” is written).
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PS2 keyboard
DB9 (female) connector for PC serial port (UART) connection
DB9 (male) connector for serial (UART) connection to GPS module
On-board numeric keypad
Audio jack and 2-pin connector for the external speaker
Wago connector for RS485 communication between the master and slave control
units
10 x 2 header (Ext.Con) for flat-ribbon cable connection to display unit
Slot for microSD card
Screw type connector for 5 V DC power connection
Doc ID 16147 Rev 1
Figure 5
shows the on-board switches.
System description
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