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Getting started with the X-NUCLEO-LED12A1 LED driver expansion board based
Introduction
The
X-NUCLEO-LED12A1
LED driver expansion board for
48 LEDs.
The
LED1202
is a 12-channel low quiescent current LED driver, which guarantees 5 V output driving capability. Each channel is
able to provide up to 20 mA with a headroom voltage of 350 mV (typ.) only.
The output current can be adjusted separately for each channel through an 8-bit analog and 12-bit digital dimming control.
The
X-NUCLEO-LED12A1
expansion board comes with an additional LED panel board that houses two LEDs matrices: a 6x8
white LED matrix and a 4x4 RGB matrix.
LED matrices can be supplied via an external power supply connected to J13 connector and by selecting the right path through
J15 jumper to reach the maximum luminosity available.
UM2879 - Rev 2 - November 2021
For further information contact your local STMicroelectronics sales office.
STM32 Nucleo
Figure 1.
X-NUCLEO-LED12A1 expansion board
Figure 2.
LED panel board
on LED1202 for STM32 Nucleo
features four
LED1202
devices that can drive up to
UM2879
User manual
www.st.com
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Summary of Contents for ST X-NUCLEO-LED12A1
- Page 1 UM2879 User manual Getting started with the X-NUCLEO-LED12A1 LED driver expansion board based on LED1202 for STM32 Nucleo Introduction X-NUCLEO-LED12A1 LED driver expansion board for STM32 Nucleo features four LED1202 devices that can drive up to 48 LEDs. LED1202 is a 12-channel low quiescent current LED driver, which guarantees 5 V output driving capability. Each channel is able to provide up to 20 mA with a headroom voltage of 350 mV (typ.) only.
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Page 2: Getting Started
UM2879 Getting started Getting started Overview X-NUCLEO-LED12A1 expansion board features: • Four LED1202 devices driving up to 48 LEDs • One double row pin array connector for external LED panel connection • One jumper selector for internal/external LED power supply •... -
Page 3: Connectors
LED1202 ICs and the STM32 Nucleo development board are connected through CN5, CN6, CN8 and CN9 connectors (see the tables below). Table 1. Interconnections between X-NUCLEO-LED12A1 expansion board and NUCLEO-L073RZ development board (left side) Signal Connector Pin number NUCLEO-L073RZ X-NUCLEO-LED12A1... - Page 4 UM2879 Connectors Signal Connector Pin number NUCLEO-L073RZ X-NUCLEO-LED12A1 IRQ_MCU PA10 CN9 Digital UM2879 - Rev 2 page 4/17...
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Page 5: Host Interface And Gpio Connection
UM2879 Host interface and GPIO connection Host interface and GPIO connection X-NUCLEO-LED12A1 expansion board embeds four LED1202 devices and is powered by the STM32 Nucleo development board. The devices are driven by the microcontroller via I C interface, connected through the same I C bus and synchronized by a clock chain. -
Page 6: Components
UM2879 Components Components Figure 3. X-NUCLEO-LED12A1 expansion board component placement LED1202 LED1202 LED1202 LED1202 LED panel connector LED panel power supply connector UM2879 - Rev 2 page 6/17... -
Page 7: Led1202
UM2879 LED1202 LED1202 LED1202 is a 12-channel low quiescent current LED driver which guarantees 5 V output driving capability. Each channel is able to provide up to 20 mA with a headroom voltage of 350 mV (typ.) only. The output current can be adjusted separately for each channel by an 8-bit analog and 12-bit digital dimming control. -
Page 8: Board Setup
UM2879 Board setup Board setup To test the expansion board follow the procedure below. Step 1. Connect the X-NUCLEO-LED12A1 expansion board to the STM32 Nucleo development board from the top through the Arduino UNO R3 connectors. Step 2. Power the STM32 Nucleo development board using a mini-B USB cable. -
Page 9: Schematic Diagrams
Schematic diagrams Figure 4. X-NUCLEO-LED12A1 expansion board circuit schematic NUCLEO MORPHO CONNECTORS L1_CS0 L2_CS11 CN10 L1_CS1 L2_CS10 L1_CS2 L2_CS9 L1_CS3 L2_CS8 L1_CS4 L2_CS7 L1_CS5 L2_CS6 L1_CS6 L2_CS5 VOUT L1_CS7 L2_CS4 L1_CS8 L2_CS3 L1_CS9 L2_CS2 LDL112PT-TR R1336K L1_CS10 L2_CS1 L1_CS11 L2_CS0... - Page 10 Figure 5. LED panel circuit schematic...
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Page 11: Bill Of Materials
UM2879 Bill of materials Bill of materials Table 3. X-NUCLEO-LED12A1 expansion board bill of materials Item Q.ty Ref. Part/Value Description Manufacturer Order code CN5 Female on Top, Male CONN1x10 2.54 mm Connector Wurth 61301011121 on Bottom CN6, CN9 Female on CONN1x8 2.54 mm... - Page 12 UM2879 Bill of materials Table 4. LED panel bill of materials Manufact Item Q.ty Ref. Value Description Part Number urer D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, D24, D25, D26, D27, D28, PLCC White LEDs...
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Page 13: Revision History
UM2879 Revision history Table 5. Document revision history Date Revision Changes 27-Sep-2021 Initial release. 08-Nov-2021 Updated Section 2 Connectors Section 6 Board setup. UM2879 - Rev 2 page 13/17... -
Page 14: Table Of Contents
UM2879 Contents Contents Getting started ..............2 Overview . -
Page 15: List Of Tables
X-NUCLEO-LED12A1 expansion board bill of materials ........ -
Page 16: List Of Figures
X-NUCLEO-LED12A1 expansion board component placement ........ - Page 17 ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’...
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