STMicroelectronics STEVAL-LLL002V1 User manual

Introduction
The STEVAL-LLL002V1 evaluation kit consists of the STEVAL-LLL002M1 main board and the STEVAL-LLL002D1 USB-UART
bridge.
It has been designed to test and evaluate ALED1262ZT performance.
The STEVAL-LLL002M1 is a LED array driver system evaluation board with local dimming and diagnostics for automotive
applications. It is based on the ALED1262ZT 12-channel LED driver controlled through the STM8AF6266 microcontroller I²C
interface.
A 48 red LED matrix is driven by four ALED1262ZT LED drivers.
The on-board A7986A DC-DC converter, accepting standard adapter input voltages with reverse polarity protection, provides
the voltages and power for the board operation.
The STEVAL-LLL002V1 evaluation kit jumpers simulate LED open circuit faults and the 4-pin SWIM connector is used to debug
and develop the STM8AF6266 microcontroller firmware.
The evaluation kit can operate in bus driven mode (BDM), standalone mode (SAM) and GUI mode.
In the bus driven mode, the board is controlled via on-board push buttons and potentiometers. Commands to the ALED1262ZT
driver are sent by STM8A microcontroller over I²C bus.
In the standalone mode, the STEVAL-LLL002V1 evaluation kit is not controlled by the MCU and you can select two possible
output configurations using OTP ½ SPDT switch (SW2).
In the GUI mode, the board is connected to a PC via USB-UART bridge and you can observe and control various features of the
driver through the graphical user interface.
Figure 1. STEVAL-LLL002V1 evaluation kit
Getting started with the evaluation kit for automotive rear lights with pattern
animations based on ALED1262ZT and STM8AF6266
UM2381
User manual
UM2381 - Rev 1 - June 2019
For further information contact your local STMicroelectronics sales office.
www.st.com

1Hardware description
1.1 STEVAL-LLL002M1 main board
The STEVAL-LLL002M1 evaluation board includes four ALED1262ZT LED drivers, an 8-bit automotive grade
MCU, a SWIM connector to program the MCU, 48 red LEDs, push buttons to switch modes, and potentiometers
to control brightness and speed.
The on-board A7986A DC-DC converter, accepting standard adapter input voltages (12 – 24 V), provides the
voltages and power for the board operation.
Figure 2. STEVAL-LLL002V1M main board (top side)
Figure 3. STEVAL-LLL002V1M main board (bottom side)
1.1.1 Chip select (CS) one time programming (OTP)
The STEVAL-LLL002M1 evaluation board has four ALED1262ZT drivers.
The ALED1262ZT LED driver is provided with five one time programming (OTP) memory cells that can be
programmed to provide a permanent address to the device, creating a total of 32 driver addresses, that is, at a
given time, a maximum of 32 drivers can be connected to the to the MCU via I²C bus.
Table 1. STEVAL-LLL002M1 evaluation board: ALED1262ZT addresses
ALED1262ZT WRITE READ
Default 0x40 0x41
LED driver - U4 0x42 0x43
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Hardware description
UM2381 - Rev 1 page 2/29

ALED1262ZT WRITE READ
LED driver - U5 0x44 0x45
LED driver - U6 0x46 0x47
LED driver - U7 0x48 0x49
On-board J2 is used to select the ALED1262ZT device for OTP. The LED driver is given a particular command
over I²C providing 18 V (±1 V) to be applied at the corresponding chip select (CS) pin.
Note: For more information please refer to the ALED1262ZT datasheet on www.st.com.
1.2 STEVAL-LLL002D1 USB-UART bridge
The STEVAL-LLL002V1 evaluation kit is also equipped with a USB-UART bridge for the communication between
PC and microcontroller.
Figure 4. STEVAL-LLL002V1D (top side)
Figure 5. STEVAL-LLL002V1D (bottom side)
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STEVAL-LLL002D1 USB-UART bridge
UM2381 - Rev 1 page 3/29

1.3 Evaluation kit block diagram
Figure 6. STEVAL-LLL002V1 block diagram
1.4 STEVAL-LLL002V1 key devices
The STEVAL-LLL002V1 main devices are:
•A7986A: a high efficiency step down 250 kHz (programmable up to 1 MHz) switching regulator with max. 3 A
DC output current. Input voltage varies from 4.5 to 38 V and also depends on the required output. It supports
low dropout operation along with zero load current operation. Overcurrent and thermal protection are
provided for safe board operation. It powers the red LEDs.
•LM2931: an AEC-Q100 qualified 100 mA LDO regulator designed for automotive environments.
•STM8AF6266: an automotive grade 8-bit microcontroller, featuring 10 MIPS at 16 MHz CPU, advance
timers, UART, ADC, robust I/O's, nested interrupt controller.
•L78L33ACUTR: a three terminal positive regulator. It gives output current up to 100 mA and output voltage
of 3.3 V. The L78L series uses as Zener diode/resistor combination replacement, resulting in a lower
quiescent current and lower noise.
• Diode bridge: at the power supply input ensures board operation regardless of the input voltage polarity.
• 48 red SMD LEDs mounted in a 12x4 matrix to display different patterns. The minimum luminous intensity of
a LED is around 3.55 cd with wide viewing angle of 120º and wavelength of 623 nm.
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Evaluation kit block diagram
UM2381 - Rev 1 page 4/29

2STEVAL-LLL002V1 connections
2.1 Power supply
The STEVAL-LLL002V1 evaluation kit is powered by standard 12–24 V DC power adapter.
The power source must deliver sufficient current depending on the input voltage for proper functioning.
Reverse voltage protection and input surge protection are provided to avoid any damage.
2.2 Microcontroller SWIM
The STEVAL-LLL002V1M board is equipped with a standard 4-pin SWIM connector allowing to debug and
develop the STM8AF6266 microcontroller firmware.
2.3 Jumpers for LED open-circuit simulation
LED errors can be simulated by using J5 to J8 jumpers.
Removing a jumper on J5, J6, J7 and J8 causes LED open-circuit error in D48, D49, D50 and D51 respectively.
These simulated errors can be detected in error detection mode: the defective LED is signaled by lighting the
adjacent LED on the board in standalone mode, and by flashing the corresponding light in the LED map in GUI
mode.
2.4 USB-UART bridge
The STEVAL-LLL002V1 communicates with the GUI via the USB-UART board, which acts as the bridge between
STM8AF6266 and your PC.
It communicates with the main board via UART interface and with PC via USB.
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STEVAL-LLL002V1 connections
UM2381 - Rev 1 page 5/29

3Operation modes
3.1 Bus driven mode
In this mode, STEVAL-LLL002V1 is controlled via on-board push buttons and potentiometers.
Commands to the ALED1262ZT LED driver are sent by STM8AF6266 microcontroller through I²C interface.
After DC input is applied for the first time, the board goes into free running mode and displays all patterns and
modes, one after another.
You can exit from this free running mode using the BCK or FWD button.
3.1.1 Features
In bus driven mode, the board features:
•Pre-configured patterns (with adjustable brightness/speed) as rolling text, wave effect, super car scanning,
dot sequence, etc.
• On-board push buttons to switch between the demos
• Potentiometers as sliders to control the pattern speed or brightness
• Open circuit error simulation using open circuit jumpers (J5-J8)
• Jumper to switch from bus driven mode to standalone mode (J4)
• OTP ½ switch (SW2) to choose between two different predefined pattern in SAM mode
3.1.2 Normal mode
The STEVAL-LLL002V1 evaluation kit enters the bus driven mode (BDM) when powered.
In this mode, the MCU sends data over I²C bus to the ALED1262ZT LED driver.
Note: To operate in BDM mode, jumper J4 should be placed.
The bus driven mode main controls are:
• Push-buttons for transition among different demos:
– BCK button: to switch on the previous pattern or mode
– FWD button: to switch on the next pattern or mode
• Potentiometers:
– Brightness and speed control: on rotating potentiometer clockwise/anticlockwise, brightness/speed
among transitions increases/decreases.
• Open circuit error detection to detect LED failure
Note: On powering up, the evaluation board goes into free running mode displaying pattern changes after a fixed
interval of time. You can exit from this mode by pressing FWD or BCK push buttons.
The evaluation board displays different patterns in BDM:
1. Dot Sequence Rail
2. Back Light (all LEDs on)
3. Super Car Scanning Effect - I
4. Alphanumeric Flashing
5. Super Car Scanning Effect - II
6. Alphanumeric Rolling
7. Animation – 3D
8. Horizontal Wave
9. Pattern – I
10. Vertical Wave
11. Diagonal Wave
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Operation modes
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12. Pattern – II
13. Error Detection
Note: In Alphanumeric Flashing Pattern, you can control the speed only.
In Super Car Scanning Effect – I, Super Car Scanning Effect – II, Animation – 3D, Pattern – I and Pattern – II
you cannot control brightness as the ALED1262ZT PWM (7-bit individual channel control) feature is enabled.
3.1.3 Error detection
ALED1262ZT driver is capable of detecting error for open circuit.
The STEVAL-LLL002V1 evaluation kit provides the option to simulate and detect errors by entering the error
detection mode using FWD or BCK buttons.
Removing jumpers J5, J6, J7 and J8 causes LED open circuit error in D48, D49, D50 and D51 respectively.
The defective LED is signaled by switching on the adjacent LED.
Table 2. STEVAL-LLL002V1 error detection mode
Jumper Error in LED Shown on LED
J5 D48 D44
J6 D49 D45
J7 D50 D46
J8 D51 D47
Figure 7. STEVAL-LLL002V1 evaluation kit: error detection mode (J6 and J7 removed)
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Bus driven mode
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3.2 Standalone mode (SAM)
The STEVAL-LLL002V1 enters the SAM mode when the driver supply falls belows 3 V (removing jumper J4 that
is disconnecting the ALED1262ZT LED driver).
In standalone mode configuration, the device is not controlled by the MCU or a controller board.
You can select two possible output configurations using OTP ½ SPDT switch (SW2).
Figure 8. STEVAL-LLL002V1 evaluation kit: standalone mode (configuration 1)
Figure 9. STEVAL-LLL002V1 evaluation kit: standalone mode (configuration 2)
3.2.1 Features
The board enters the standalone mode by removing J4.
This mode mainly features:
•ALED1262ZT working without external controller
• Two different ouptus
• OTP ½ switch (SW2) to choose a configuration
3.3 GUI mode
The board can be connected to a PC through a USB-UART bridge using the graphical user interface (GUI) to
control and evaluate the ALED1262ZT driver features.
3.3.1 Features
All the bus driven mode features can also be controlled via GUI that manages also:
• Global brightness control to change the brightness of all the channels
• Frame programming mode and four predefined presets with variable transition time between frames
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Standalone mode (SAM)
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• Open circuit error detection in "no loop" and in 1 s and 2 s (approx.) loops
•Read/write configuration register
• Individual channel brightness control
3.3.2 GUI setup
To use the STEVAL-LLL002V1 GUI, you have to install the virtual COM port (VCP) driver on your PC/laptop by
following the procedure below.
Step 1. Install the .exe file on your PC.
The GUI appears in your program list.
Step 2. If the VCP driver is not installed, install it from ...\Program Files\ STMicroelectronics\LED Driver Demo
\ST VCP Driver. A 32-bit version and a 64-bit version are included in the setup.
On launching the GUI, the initial screen appears as shown below.
Figure 10. STEVAL-LLL002V1 evaluation kit: GUI initial screen
Step 3. Connect the STEVAL-LLL002M1 to the PC and power it up.
Step 4. Press [Connect].
The GUI identifies the board and automatically establishes a connection (COM3 is shown as an
example in the picture above), otherwise it prompts the user to select the port to which the board is
connected.
Step 5. If the GUI does not automatically identify the board, choose the port manually and press [Select].
When the GUI is able to interact with the board, a "Port is open” message is shown.
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GUI mode
UM2381 - Rev 1 page 9/29

3.3.3 Modes
3.3.3.1 Basic mode
The STSW-LLL002GUI basic mode mainly features:
• Replication of on-board control buttons to select different modes from the GUI
• Buttons to enable/disable on-board push buttons
• Open circuit error detection with different frequencies
• Adjustable global brightness for all the channels
• Control registers write/read (BDM_Conf 1)
• Various flag status reading (BDM_status)
The basic mode has five sections to address different requirements:
• Button control
• Error detection
• Brightness control for all channels
• Configuration registers
• Individual channel ON/OFF control
Figure 11. STSW-LLL002GUI basic mode
3.3.3.1.1 Button control
The control buttons replicate the on-board BCK and FWD buttons and are used to toggle among preconfigured
demos.
The on-board buttons can be enabled or disabled by pressing [Enable] or [Disable] respectively.
3.3.3.1.2 Error detection
The error detection section demonstrates open circuit error (if any) present in the 12x4 LED matrix.
Error detection frequency can be selected from three options:
•No loop - error detection is performed just once and the results are displayed till any other button is pressed
• 1 second loop - error detection is performed every 1 s by the drivers and the results are updated in real-time
• 2 second loop - same as 1 second loop but error detection is performed every 2 s
3.3.3.1.3 Brightness control for all channels
Brightness of all the channels is simultaneously changed by varying brightness control for all channel slider.
Brightness can be varied in 256 steps (5% to 100%).
3.3.3.1.4 Configuration registers
The configuration register section represents two registers for the ALED1262ZT LED driver:
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GUI mode
UM2381 - Rev 1 page 10/29

•BDM_Conf 1: is common for all ALED1262ZT LED drivers. You can set or reset different bits of the
registers.
•BDM_status: gives the status information for a particular LED driver selected from the drop down bar.
For further details, refer to the ALED1262ZT datasheet on www.st.com.
Figure 12. ALED1262ZT configuration register
3.3.3.2 Advanced mode
The advanced mode section displays the individual channel brightness control (0% to 100%).
The brightness of each channel can be adjusted through a 7 bit PWM grayscale brightness control according to
local dimming register PWM_gain_x.
You can change the brightness using the scroll bars put in a 12x4 pattern.
Figure 13. STSW-LLL002GUI advanced mode
3.3.3.3 Frame programming mode
This mode features:
•Frame programming to display any arbitrary pattern up to 20 frames with variable transition speed
• Four preconfigured patterns for quick visualization of frame programming mode on the STEVAL-LLL002V1
evaluation kit
Frame programming displays user defined patterns in round robin sequence on the evaluation board. This mode
contains a set of 20 (maximum) independent frames and each frame represents one instance of the board LEDs.
The frames can be designed by the user or you can select preconfigured frame patterns using [Presets].
Transition time among frames in milliseconds is set by the value in the [Transition Time] text box.
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GUI mode
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Figure 14. STSW-LLL002GUI frame programming mode
3.3.3.3.1 Frame design
A frame on the STSW-LLL002GUI represents LEDs on the evaluation board in a similar fashion. There are a
maximum of 20 frames (00 to 19) to be set using [Set Frame Count]. To design the frames and demonstrate
them on the evaluation board follow the procedure below.
Step 1. Click on the LEDs to configure them.
Step 2. Select the desired brightness using [Frame Brightness].
Step 3. Press the [Play] button for the STSW-LLL002GUI sequence of frames to visualize the whole pattern to
be displayed on the board.
Step 4. Set the required transition time between the frames and press [Program].
Note: Transition time has to be set between 10 to 10000 milliseconds. If a wrong value in entered in the box, the color
of the text box changes to red and no command is sent to the board.
3.3.3.3.2 Using preconfigured frame patterns
In frame programming mode, four preconfigured frame patterns called Presets are provided.
Preset1, Preset2, Preset3 and Preset4 can be loaded by clicking on the corresponding preset button.
Figure 15. STSW-LLL002GUI frame programming mode Preset1
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GUI mode
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Figure 16. STSW-LLL002GUI frame programming mode Preset2
Figure 17. STSW-LLL002GUI frame programming mode Preset3
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GUI mode
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Figure 18. STSW-LLL002GUI frame programming mode Preset4
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GUI mode
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4Schematic diagrams
Figure 19. STEVAL-LLL002M1 circuit schematic
STM8_UART_RX
DD2211
VDC
CC2244
LD03
6
LLEEDD
DD1144
LLEEDD
GND
8
CC77
22..22KK
LLEEDD
1 2
SDA
25
11
CS3
DD1111
RR99
JJ77
VDDD
CC44
1
SCL
4
DD3344
1
11 OTP1/2
CS
12
CC88
CCOONN22
PC4
6FSW
22..22
SWIM
µF
OPEN_4_1
VOUT
3
4477KK
11
OTP1/2
CCNN11
VCAP
6VDD
LLEEDD
LLEEDD
OPEN_3_2
16
OUT 8
17
RR77
LLEEDD
11KK
2
110000nn FF
FF11
OUT 8
17
4
3
2
1
RR2266 00EE
OUT10
15
LLEEDD
DD2255
CC3388
110000nn FF
CC1133
5
FB
DD2288
OUT 7
18
3
RReesseett
22
PD2
UU22
110000nn FF
FF
1
668800EE
110000nn FF
µ
1100KK
LLEEDD
OUT 1
24
REXT
7GND
3SCL
AALLEEDD112266 22ZZTT
00EE
VDDD
2
LLEEDD
110000nn FF
VDDD
OPEN_2_1
LLEEDD
LLEEDD
DD3311
VDDA
SCL
SCL
SS22
VRAIL
RR3344
00EE
LED DRIVER ALED1262ZT
DC-DC Power Supply
Jumpers to Simulate Open Circuit
Error Detection
Microcontroller
CC3355
11 OTP1/2
CS
12
SSWWIIMM__CCoonnnneeccttoorr
LLEEDD
OUT 7
18
LLEEDD
1 2
RR3333
00EE
CCOONN22
DD3333
19
OUT 5
NRST
110000nn FF
3
DD11
D
VDDA
1100KK
VDDA
UU88
1100KK
DD99
RR3355
00EE
UART_RX
2
VDDD
00EERR2222
1
SCL
19
27
++
CC2299 CC3300
4
J1: VDDA ENABLE/ DI SABLE
J10: UART Br i dge
Suppor t i ng
24
OUT 0
OPEN_1_2
21
EP
25
OTP1/2
14
OUT10
15
OUT11
OUT 4
21
20
OUT 4
21
LLEEDD
RR4477
33
OUT 6
19
JJ44
CC11
REXT
7GND
Mounting Holes
USB-UART BRIDGE Level Shifting
RR3322
CC3344
RR3300
VOUT
8
DF01S
1100uuFF
VDC
4
22..22
11..22nnFF
3
AALLEEDD112266 22ZZTT
LLEEDD
3SCL
OUT 3
22
LLEEDD
22AA
CC99
SWIM
1
SSTTPPSS33LL4400--YY
DD1100
LLEEDD
RR4444
CC5500
RR55
VOUT
1VIN
LLEEDD
LLEEDD
OUT 3
JJ88
SSWW__TT__SSPPDD TT
PC6
SDA
µF
RR1111
µF11
To program register
during production
2222
110000nn FF
2
DD5500
SDA
1
2
3
4
LLEEDD
RR3311
66..22KK
S
LLEEDD
11
CS3
CC2288
RR4433
LLEEDD
FLAG
CC4477
DD2233
LLEEDD
1
VDDA
5
VDD
FLG
9
CC2277 CC3333
1188
PD1 26
OUT 0
EP
25
110000nn FF
CC1166
1100uuFF
RR5533
110000nn FF
RR1122
LLEEDD
VRAIL
00EERR2233
CC1199
110000KK
µF
µF
VVDDDD
OTP1/2-Setting-Read
10
DD4477
44..77KK
LL11
DD22
CC3366
110000nn FF
UU44
22..22
OPEN_4_2
1100uuFF
VDDA
VIN
RR4411
DD88
PB2
4477KK
15
OUT 9
DD1133
8FLG
VDDA
CCOONN22
OUT 9
16
DD2266
110000nn FF
00EE
RR3377
OUT 9
Connec t or
SOT- 89
SW2: Stand Alone Mode Output Configuration
Hight Level Logic 2-1 - SAM_conf_2 register
Low Level Logic 2-3 - SAM_conf_1 register
+3.3V
16
OUT 8
17
DD2299
µF
VDDA VSSA
10
11
G
1
PD4
DD1122
STM8_UART_TX
VDD
NRST
RR66
CCOONNNN:: DD CC JJAACCKK
PD7 32
8
CCOONN22
4
66..22KK
RR5500
SDA
3
LLEEDD
VDC
AALLEEDD112266 22ZZTT
DD4466
RR1155
JJ55
DD4488
00EE
RR4422
VRAIL
DD1188
13
16
OUT 8
17
VRAIL
23
PC7
RR22
LLEEDD
LLEEDD
MMHH22
CC5522
VDD
CC33
110000nn FF
OUT11
14
DD3377
VDD
µF
VDDA
SS11
PC1
PPOOTT__1100KK
DD33
CC4444
1100uuFF
LLEEDD
SDA
BBRRIIDDGGEE
OPEN_1_1
2
OTP1/2
OUT 5
20
110000nn FF
FLAG
11..22KK
DD77
UUAARRTT__CCOONNNNEECCTTOORR
CC4455
RR44
44..77KK
CC4422
OUT 5
20
5
4
3
2
1
LD03
6
1
UU11
EN
1
AALLEEDD112266 22ZZTT
3SCL
CC3399
QQ11
LLEEDD
EP
25
RR4466
2
PA2
4
DD3355
VDDA
5
00EERR2277
CC2222
24
PE5
44..77KK
QQ22
CC3322
SSWW22
OPEN_1_2
9
4477KK
3
LLEEDD
11
11 OTP1/2
CS 13 OUT11
14
LLEEDD
SYNC
EP
9
JJ33
CC1188
SCL
J4: VDDD ENABLE/ DI SABLE
J2: Chip Select
SSWW11
20
OUT 4
OPEN_3_2
FLAG
DD3300
µF
VDDD
2
15
PB0
RR5522
FLG
9
CC1144
44..77KK
21
OUT 3
OTP1/2
UU55
CS1
VDDD
OPEN_3_1
CC4466
DD3322
LLEEDD
RR4455
GPWM
PG
10
66..22KK
OUT 5
VDD
PD3
PC5
DD2200
RR4499
LL7788LL 3333AABBUUTTRR
VVDDDD
DD4422
SCL
BBSSSS112233
OPEN_2_2
3
1 2
1
FLAG
RR2299
LLEEDD
RR33
+3.3V
RR1166
4477KK
CCOONN55
GPWM
PG
LLEEDD
OPEN_2_2
// 3355VV
D
16
µF
1 2
4477
OPEN_3_1
RR5555
PB3
13
FLAG
OUT10
9
110000nn FF
18
OUT 6
CCOONN55
110000KK
110000
RR2288 00EE
1 2
LLEEDD
CC2266
4477KK
DD4433
USB-UART BRIDGE Connectors USB-UART BRIDGE Supply
4
OUT 1
24
COMP
7GND
DD1155
DD4455
FLAG
28
CS1
2PA1
2
1
VDDA
5
VDD
STM8_UART_T X
SSTTMM88AAFF66226666
CC4499
DD44
CC3311
VRAIL
RR2200
11KK
CC1177
RR4488
FLAG
222200KK
CCOONN22
12V, 1 . 5A
CS of ALED1262ZT
PB5
11
PD0 25
23
OUT 1
OTP 1/2 Setting
110000
66..22KK
222200nnFF//5500vv
CC1100
110000nn FF
CC5511
DD2244
DD1199
3
DD3399
LLEEDD
110000nn FF
3333nnFF
UU33
JJ66
µF
2GND
CS4
1100uuFF
SSMM44TT3300CCAAYY
JJ1100
SDA
11
LLEEDD
RR11
VDDA
REXT
7
29
PD5 30
18
UART_TX
GND
RR3399
00EE
110000nn FF
22..22
S
LLEEDD
REXT
7GND
RR1133
µF
CS4
µF
CCOONN22
UU66
DD3388
OUT 2
23
RR1199
11KK
OUT 4
RR1177
MMHH33
21
OUT 3
22
VDDA
5
3
BBSSSS112233
AA77998866AA
PPOOTT__1100KK
PC2
JJ22
RR2211 00EE
NRST
UART_RX
CC66
22
LLEEDD
OUT 9
1
GND
8PF4
VSS
5
VDDIO
LD03
6
110000nn FF
VDD
110000KK
11KK
RR5511
DD2222
CC4488
JJ99
CC55
VDDA
CC2200
DD55
110000nn FF
µF
DD4400
2
12 13
OUT 6
19
110000nn FF
µF
OTP1/2
11..88KK
Gl obal PWM f or
Br i ght nes s Cont r ol
1
11
CC1122
1
DD66
2
UU77
OUT 0
2277EE
GPWM
PG
10
CC3377
RR5544
CC2211
JJ11
CS2
LLEEDD
LLEEDD
STM8_UART_RX
CC4400
23
OUT 1
24
RR4400
RR3388
FLAG
OUT 2
1
CC5533
110000EE
VDD
11
SDA
MMHH11
CC1111
11
14
PB1
µF
LLEEDD
PC3 20
OUT 6
19
7
GPWM
1100KK
DD4499
110000KK
RR88
DD5511
µF
333300nn FF
44..77KK
110000
UART_T X
2
MMHH44
4477KK
VDD
FLG
9
OPEN_4_1
LLEEDD
11
44..77KK
--
µF
VDDD
OPEN_2_1
LLEEDD
DD4444
FLAG
CC22
OUT 7
12 13
VDDD
2SDA
FLAG
OUT11
1
OPEN_1_1
CC2233
VDDD
2SDA
OUT 7
18
µF
8
µF
00EERR2255
11
RR1100
RR3366
00EE
DD1177
110000nn FF
VCC
PD6 31
22
OUT 2
23
1
EP
OUT 0
LLEEDD
OPEN_4_2
VDDA
4
DD3366
G
1100KK
RR1144
LD03
6
LLMM22993311AADDTT5500RRYY
LLEEDD
110000nn FF
PB4
12
00EERR2244
GPWM
PG
10
DDNNMM
OTP1/2-Setting-Read
GPWM
11uuFF
1 2 3 4 5
I / P
// 3355VVµF
14
OUT10
15
17
22
OUT 2
CC4411
11 OTP1/2
CS
CC1155
DD4411
DD2277
DD1166
110000nn FF
CC2255
LLEEDD
1
CC4433
LLEEDD
RR1188
CS2
UM2381 - Rev 1 page 15/29
UM2381
Schematic diagrams

Figure 20. STEVAL-LLL002D1 circuit schematic
20
28
BOOT0
VSSA
PB3
PA8
10
UART_TX_USB
4
GND
1
R14
22
J5
CON4
12
2
C17
4.7nF
18
PB6
35
USBDP_PA12
PA4
5
3
33
J5
CON4
30
I/O2
VSS_3
8
C21
100nF
36
PA1
VDD_1
ESDAULC6-3BP6
USB_DP
3
SHELL
PA3
OSC_IN_USB
VDD
R16
1M
4
C22
4.7nF
6
VDD
GND
2
34
SHELL
SWDIO
C23
15pF
6
C1
20pF
3
C18
15pF
CONNECTOR
VDDA
GND
19
NRST_USB
4
1
14
USB_DP
C23
15pF
R16
1M
23
BOOT1
U4
STM32F103T8U6
GND
USBDM_PA11
PA14
C9
100nF
2
1
R14
22
29
SHELL
SW1
SW_PB_SPST
GND
VDD_3
PB0
I/O3
1
15
5
C21
100nF
PA12
4
NRST_USB
VDD
PA7
USB_PU_PB3
6
24
C19
100nF
OSC_IN_USB
32
PA11
11
CN1
USB_DM
7
C22
4.7nF
PA15
J6
USB_UART_Connector
9
PA10
C1
20pF
PB2
PA13
USBDM
25
C2
20pF R84.7K
OSC_OUT_USB
J3
SWD Connector
VDD
ID
SWCLK
CN1
SWCLK
31
PB4
VSS_1
C13
100nF
5
PB1
OSC_OUT_USB
PA0-WKUP
J6
USB_UART_Connector
4
USBDP
PA6
USB_VCC
22
NRST
1
C13
100nF
USB_DM
R1
1M
SW1
SW_PB_SPST
1
16
SWDIO
J3
SWD Connector
UART_RX_USB
R17
1.5k
C19
100nF
C18
15pF
OSC_IN/PD0
GND
21
C9
100nF
GND
9
8
UART_RX_USB
C20
100nF
STM32 section
I/O1
USB_GND
4
OSC_OUT/PD1
VSS_2
USBDP_PA12
3
BOOT1
NC
VDD
R1
1M
PB5
OSC_OUT_USB
USB_PU_PB3
C17
4.7nF
ESDAULC6-3BP6
2
17
VDD
PA5
BOOT0
3
PA2
VDD
U3
USB section
R84.7K
C2
20pF
3
R10
PB7
VDD_2
R17
1.5k
26
27
C20
100nF
13
5
SHELL
BOOT0
OSC_IN_USB
U3
UART_TX_USB
7
U4
STM32F103T8U6
2
GND
USBDM_PA11
NC
2
PA9
22
UM2381 - Rev 1 page 16/29
UM2381
Schematic diagrams

5Bill of materials
Table 3. STEVAL-LLL002V1M bill of materials
Item Q.ty Ref. Part/Value Description Manufacturer Order code
1 1 U1 A7986A 38 V/3 A
HSOP8
3 A step-down
switching
regulatorfor
automotive
applications
ST A7986A
2 1 U2 STM8AF6266
LQFP32
Automotive 8-bit
MCU ST STM8AF6266TDY
3 1 U3 LM2931ADT50R 5
V DPAK
Very low drop
voltage regulators
with inhibit function
ST LM2931ADT50RY
4 4 U4, U5, U6, U7 ALED1262W
TSSOP24
Automotive-grade
12-channel LED
driver
ST ALED1262ZTTR
5 1 U8 L78L33ABUTR 3.3
V/100 mA SOT-89
0.1 A positive
voltage regulators ST L78L33ABUTR
6 1 D1 STPS3L30-Y 30 V
SMC
Automotive power
Schottky rectifier ST STPS3L40SY
7 1 D2 SM4T30CAY 400
W SMA
Automotive 400 W
TVS in SMA ST SM4T30CAY
8 1 R10 4.7 K 1/8 W ±1%
SMD-0805 Thick film resistors ANY ANY
9 5 R1, R17, R18,
R49, R50
4.7 K 1/8 W ±5%
SMD-0805 Thick film resistors ANY ANY
10 5 R2, R3, R13, R14,
R55
10 K 1/8 W ±5%
SMD-0805 Thick film resistors ANY ANY
11 6 R4, R5, R41, R43,
R44, R47
47 K 1/8 W ±5%
SMD-0805 Thick film resistors ANY ANY
12 4 R6, R19, R20, R51 1 K 1/8 W ±5%
SMD-0805 Thick film resistors ANY ANY
13 1 R7 27 E 1/8 W ±5%
SMD-0805 Thick film resistors ANY ANY
14 1 R8 2.2 K 1/8 W ±5%
SMD-0805 Thick film resistors ANY ANY
15 1 R9 680 E 1/8 W ±5%
SMD-0805 Thick film resistors ANY ANY
16 1 R11 220 K 1/8 W ±5%
SMD-0805 Thick film resistors ANY ANY
17 1 R12 1.2 K 1/8 W ±1%
SMD-0805 Thick film resistors ANY ANY
18 2 R15, R16 10 K 20 V ±30%
Through Hole Potentiometer Alps RK09K1130AP5
19 16
R21, R22, R23,
R24, R25, R26,
R27, R28, R33,
R34, R35, R36,
R37, R39, R40,
R42
0 E ±10%
SMD-0805 Thick film resistors ANY ANY
UM2381
Bill of materials
UM2381 - Rev 1 page 17/29

Item Q.ty Ref. Part/Value Description Manufacturer Order code
20 4 R29, R30, R31,
R32
6.2 K 1/8 W ±1%
SMD-0805 Thick film resistors ANY ANY
21 4 R38, R45, R46,
R48
100 K 1/8W ±10%
SMD-0805 Thick film resistors ANY ANY
22 1 R52 SMD-0805 Thick film resistors
(not mounted)
23 1 R53 1.8 K 1/8 W ±5%
SMD-0805 Thick film resistors ANY ANY
24 1 R54 100 E 1/8 W ±5%
SMD-0805 Thick film resistors ANY ANY
25 23
C1, C5, C9, C14,
C15, C17, C18,
C19, C20, C21,
C23, C29, C31,
C33, C35, C37,
C39, C41, C47,
C48, C49, C50,
C52
100 nF 25 V ±10%
SMD-0805
Ceramic
capacitors ANY ANY
26 5 C2, C6, C8, C13,
C16
10 µF 25 V ±10%
SMD-0805
Ceramic
capacitors ANY ANY
27 4 C25, C26, C27,
C28
2.2 µF 6.3 V ±10%
SMD-1206
Ceramic
capacitors ANY ANY
28 1 C53 100 µF 16 V ±10%
SMD-1206
Ceramic
capacitors ANY ANY
29 2 C3, C22 100 µF 6.3 V
±10% SMD-1206
Ceramic
capacitors ANY ANY
30 1 C4 33 nF 25 V ±10%
SMD-0805
Ceramic
capacitors ANY ANY
31 1 C7 1.2 nF 25 V ±10%
SMD-0805
Ceramic
capacitors ANY ANY
32 1 C10 47 µF 35 V ±10%
SMD-1206
Ceramic
capacitors ANY ANY
33 1 C11 22 µF 35 V ±10%
SMD-1206
Ceramic
capacitors ANY ANY
34 1 C12 220 nF 50 V ±10%
SMD-0805
Ceramic
capacitors ANY ANY
35 12
C24, C30, C32,
C34, C36, C38,
C40, C42, C43,
C44, C45, C46
1 µF ±10%
SMD-0805
Ceramic
capacitors ANY ANY
36 1 C51 330 nF ±10%
SMD-0805
Ceramic
capacitors ANY ANY
37 1 D3 200 V/2 A SMD Bridge rectifier Comchip
Technology DF201ST-G
UM2381
Bill of materials
UM2381 - Rev 1 page 18/29

Item Q.ty Ref. Part/Value Description Manufacturer Order code
38 48
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, D29,
D30, D31, D32,
D33, D34, D35,
D36, D37, D38,
D39, D40, D41,
D42, D43, D44,
D45, D46, D47,
D48, D49, D50,
D51
LED 2.1 V/140 mA
PLCC-6
High Power red
LED
Osram Opto
Semiconductor LR G6SP-CBEA-1-1-Z
39 1 F1 2 A 60 V through
hole Fuse Littelfuse Inc. RKEF160
40 1 L1 18 µH 4.2 A 0.2
SMD/SMT Fixed inductors Wurth Electronics 744770118
41 2 Q1,Q2
N Channel
MOSFET 100 V
SOT-23
N channel logic
level MOSFET
Fairchild
Semiconductor BSS123
42 6 J1, J4, J5, J6, J7,
J8
CON2 2X1 through
hole
2.54 mm pitch
berg stick male ANY ANY
43 1 J2 CON5 5X1 through
hole
2.54 mm pitch
berg stick male ANY ANY
44 1 J10 CON5 5X1 through
hole
2.54 mm pitch
berg stick male ANY ANY
45 1 J3 SWIM_Connector Connector ERNI 284697
46 1 J9 CON4 4X1 through
hole
2.54 mm pitch
berg stick female ANY ANY
47 1 SW1 SW reset 12 V/ 50
mA SMD
Reset switch/
SPST Multicomp DTSM-32S-B
48 1 SW2
Switch KEY-SPDT
30 V/ 100 mA
through hole
SPDT EAO 09.03201.02
49 2 S1,S2 PUSHBUTTON
SMD SPST-NO TE Connectivity FSM4JSMATR
50 1 CN1 DC Jack 24VDC /
5A Through Hole Input power jack CUI Inc PJ-102AH
Table 4. STEVAL-LLL002V1M bill of materials
Item Q.ty Ref. Part/Value Description Manufacturer Order code
1 1 U3 ESDAULC6-3BP6
SOT666
ESD protection for
high speed
interface
ST ESDAULC6-3BP6
2 1 U4
STM32F103T8U6
VFQFPN 36
6x6x1-0
Mainstream
performance line,
ARM Cortex-M3
MCU
ST STM32F103T8U6
3 1 SW1 SPST 12 V SMD Switch Multicomp DTSM-32S-B
4 1 CN1 SMD USB-B type Samtec Inc MUSB-05-S-B-SM-A
UM2381
Bill of materials
UM2381 - Rev 1 page 19/29

Item Q.ty Ref. Part/Value Description Manufacturer Order code
5 1 J3 Connector, male
5x1 through hole
2.54 mm pitch
berg stick male ANY ANY
6 1 J5 16 MHz 4-SMD Crystal ABRACON ABM10-16.000MHZ-E20-T
7 1 J6 Connector, male
4x1 through hole
2.54 mm pitch
berg stick male ANY ANY
8 2 R1, R16 1 M 1/16 W ±1%
SMD0402 Thin Film ANY ANY
9 1 R8 4.7 K 1/16 W ±1%
SMD0402 Thin Film ANY ANY
10 2 R10, R14 22 E 1/16 W ±1%
SMD0402 Thin Film ANY ANY
11 1 R17 1.5 k 1/16 W ±1%
SMD0402 Thin Film ANY ANY
12 2 C1, C2 20 pF 50 V
SMD0402 Ceramic ANY ANY
13 5 C9, C13, C19,
C20, C21
100 nF 50 V
SMD0402 Ceramic ANY ANY
14 2 C17, C22 4.7 nF 50 V
SMD0402 Ceramic ANY ANY
15 2 C18, C23 15 pF 50 V
SMD0402 Ceramic ANY ANY
UM2381
Bill of materials
UM2381 - Rev 1 page 20/29