39×9 DOTS MATRIX LED DRIVER

39×9 DOTS MATRIX LED DRIVER

Lumissil Microsystems – www.lumissil.com 1 Rev. B, 08/31/2021

DESCRIPTION

The IS31FL3741A is a general purpose 39×9 LED Matrix programmed via an I2C compatible interface. Each LED can be dimmed individually with 8-bit PWM data and 8-bit scaling data which allowing 256 steps of linear PWM dimming and 256 steps of DC current adjustable level.

Additionally each LED open and short state can be detected, IS31FL3741A store the open or short information in Open-Short Registers. The Open-Short Registers allowing MCU to read out via I2C compatible interface. Inform MCU whether there are LEDs open or short and the locations of open or short LEDs.

FEATURES

Supply voltage range from 2.7V to 5.5V 39 Current Sink × 9 SW matrix size: drive up to

351 LEDs or 117 RGBs Individual 256 PWM control steps Individual 256 DC current steps Global 255 current setting SDB rising edge reset I2C module 29kHz/3.6kHz/1.8kHz/900Hz PWM frequency Interrupt and state lookup registers Individual open and short error detect function De-ghost QFN-60 (7mm×7mm) package QUICK START

Figure 1: Photo of IS31FL3741A Evaluation Board

RECOMMENDED EQUIPMENT

5.0V, 2A power supply

ABSOLUTE MAXIMUM RATINGS

≤ 5.5V power supply

Caution: Do not exceed the conditions listed above, otherwise the board will be damaged.

PROCEDURE

The IS31FL3741A evaluation board is fully assembled and tested. Follow the steps listed below to verify board operation.

Caution: Do not turn on the power supply until all connections are completed.

1) Connect 3V and P2. 2) Connect SDA and P1. 3) Connect SCL and P3. 4) Connect SDB and P4 5) Connect PVCC and SDB. 6) Turn on the power supply/Plug in the Micro USB

Pay attention to the supply current. If the current exceeds 1A, please check for circuit fault.

EVALUATION BOARD OPERATION

The IS31FL3741A evaluation board has three animation display modes. Press K1 to switch configurations.

1) Rainbow wave#1 2) Rainbow wave#2 3) Rain 4) Visor

Note: IS31FL3741A solely controls the FxLED function on the evaluation board.

ORDERING INFORMATION

Part No. Temperature Range Package

IS31FL3741A-QFLS4-EB -40°C to +125°C (Industrial) QFN-60, Lead-free

Table 1: Ordering Information

For pricing, delivery, and ordering information, please contacts Lumissil’s analog marketing team at [email protected] or (408) 969-6600.



SOFTWARE SUPPORT

P2 and 3V default setting is closed (jumper on). If it is open (no jumper), the on-board MCU will configure its own I2C/SDB/ADDR pins to High Impedance status so an external source can driver the I2C/SDB signals to control the IS31FL3741A LED driver.

The ADDR pin is pulled high via R6 setting the device address of IS31FL3741A to 0x60.

GND

SDASCL

SDB

VCC

Figure 2: Photo of Arduino UNO connected to Evaluation Board

The steps listed below are an example using the Arduino for external control.

The Arduino hardware consists of an Atmel microcontroller with a bootloader allowing quick firmware updates. First download the latest Arduino Integrated Development Environment IDE (1.6.12 or greater) from www.arduino.cc/en/Main/Software. Also download the Wire.h library from www.arduino.cc/en/reference/wire and verify that pgmspace.h is in the directory …program Files(x86)/Arduino/hardware/tools/avr/avr/include/avr/. Then download the latest IS31FL3741A test firmware (sketch) from the Lumissil website http://www.lumissil.com/products/led-driver/fxled.

1) Open P2 and 3V. 2) Open PVCC and SDB. 3) Connect the 5 pins from Arduino board to

IS31FL3741A EVB: a) Arduino 5V pin to IS31FL3741A EVB PVCC. b) Arduino GND to IS31FL3741A EVB GND. c) Arduino SDA (A4) to IS31FL3741A EVB P1. d) Arduino SCL (A5) to IS31FL3741A EVB P3. e) If Arduino use 3.3V MCU VCC, connect

3.3V to IS31FL3741A EVB SDB, if Arduino use 5.0V MCU VCC, connect 5.0V to EVB SDB. (Arduino UNO MCU VCC is 5V, so SDB can be 5V or 3.3V)

4) Use the test code in appendix I or download the test firmware (sketch) from the Lumissil website, a .txt file and copy the code to Arduino IDE, compile and upload to Arduino.

5) Run the Arduino code as appendix I. 6) In EVB code, the ADDR pin is pulled low via

100k, so the device address is 0x60. When P1~P4 are disconnect, the ADDR pin can be changed by connecting the ADDR as follows: a) ADDR=VCC, device address=0x66. b) ADDR=SCL, device address=0x62. c) ADDR=SDA, device address=0x64.

Please refer to the datasheet to get more information about IS31FL3741A.



GND

3V

SDA_MSCL_M

INTB

USB_DM2USB_DP2DIOGND3V

GND

10nF

C7

VIN1

GND2

EN3

BP 4

VOUT 5

U2

LDO

1uFC9

3V

CLK

1uFC4

3V

0.1uF

C2

0.1uF

C1

MCU

3V Power

100KR6

1KR1

K1

1uFC6

0.1uF

C3

10KR46

1234567891011121314151617181920

CON4GNDGND

CLKDIO3VINTB

SDASCL

ADDRGNDSCLSDA

PVCC

SDB

3V

SDB_M

Micro USB

VCC1

USB_DM2

USB_DP3

NC4

GND5

Con5

10uF

C10

PVCC

22RR4822RR49

USB_DM2USB_DP2

1.5K

R473V

USB_DMUSB_DP

10uF

C11

D1

DFL240D2

DFL240

IO

PVCC

SDASCLINTBSDB

ADDR

3V

10KR5

PVCC

PVCC

1KR2100KR3100KR4

SW01SW02SW03SW04SW05SW06

CS01CS02CS03CS04CS05CS06CS07CS08CS09CS10CS11CS12CS13CS14CS15CS16CS17CS18CS19CS20CS21CS22CS23CS24CS25CS26CS27CS28CS29CS30

GND

PVCCPVCCPVCC

GND

SDB

OSCO 2

OSCI4

GND1

GND3Y1

8M

33PC8

33P

C5

OSCO

OSCI

OSCIOSCO

PVCC

VBAT1

PC13-ANTI_TAMP2

PC14-OSC32_IN3

PC15-OSC32_OUT4

OSC_IN5

OSC_OUT6

NRST7

VSSA8

VDDA9

PA0-WKUP/ADC_IN0/TIM2_CH1_ETR10

PA1/ADC_IN1/TIM2_CH211

PA2/USART2_TX/ADC_IN2/TIM2_CH312

PA3/USART2_RX/ADC_IN3/TIM2_CH413

PA4/SPI1_NSS/ADC_IN414

PA5/SPI1_SCK/ADC_IN515

PA6/SPI1_MISO/ADC_IN6/TIM3_CH116

PA7/SPI1_MOSI/ADC_IN7/TIM3_CH217

PB0/ADC_IN8/TIM3_CH318

PB1/ADC_IN9/TIM3_CH419

PB2/BOOT120

PB10/I2C2_SCL/USART3_TX21

PB11/I2C2_SDA/USART3_RX22

VSS_123

VDD_124 PB12/SPI2_NSS/TIM1_BKIN 25PB13/SPI2_SCK/TIM1_CH1N 26PB14/SPI2_MISO/TIM1_CH2N

27PB15/SPI2_MOSI/TIM1_CH3N28PA8/TIM1_CH1/MCO 29

PA9/USART1_TX/TIM1_CH2 30PA10/USART1_RX/TIM1_CH3 31PA11/CANRX/USBDM/TIM1_CH4

32PA12/CANTX/USBDP/TIM1_ETR33PA13/JTMS/SWDIO 34

VSS_2 35VDD_2 36PA14/JTCK/SWCLK

37PA15/JTDI38PB3/JTDO 39

PB4/JNTRST 40PB5 41PB6/I2C1_SCL/TIM4_CH1

42PB7/I2C1_SDA/TIM4_CH2 43BOOT0 44

PB8/TIM4_CH3 45PB9/TIM4_CH446VSS_347VDD_3 48

U3

STM32F103C8T6

20RR11

SINK01SINK02SINK03SINK04SINK05SINK06SINK07SINK08SINK09SINK10SINK11SINK12SINK13SINK14SINK15SINK16SINK17SINK18SINK19SINK20SINK21SINK22SINK23SINK24SINK25SINK26SINK27SINK28SINK29SINK30

RSET

3V

SW01SW02 SW03SW04 SW05SW06

SINK01SINK02SINK03SINK04SINK05SINK06SINK07

SINK08SINK09SINK10SINK11SINK12SINK13SINK14SINK15SINK16SINK17SINK18SINK19SINK20SINK21SINK22SINK23

SINK24SINK25SINK26SINK27SINK28SINK29SINK30

CS34 1CS352CS363CS37 4

CS38 5CS39 6

INTB7

ADDR8

SDA9

SCL10

SDB11

GND12

RSET13

AVCC14

PVCC115

SW1 16SW2 17SW3

18SW419SW5 20

SW6 21SW7 22SW8

23SW924

PVCC225

CS1 26CS227CS328CS4 29

CS5 30CS631CS732CS8 33

CS9 34CS10 35

GND36

CS1137CS1238CS13 39

CS14 40CS15 41CS16

42CS1743CS18 44

CS19 45CS20 46CS21

47CS2248CS23 49

CS24 50CS2551CS2652CS27 53

CS28 54

GND55

CS29 56CS3057CS3158CS32 59

CS33 60

GND61

U1

IS31FL3741A_QFN60

SW07SW08SW09

CS31CS32CS33CS34CS35CS36CS37CS38CS39

SINK31SINK32SINK33SINK34SINK35SINK36SINK37SINK38SINK39

SINK31SINK32SINK33SINK34SINK35SINK36SINK37SINK38SINK39

IS31FL3741A_QFN60

1 23 45 67 89 1011 1213 1415 16

CON1

Header 8X2

1 23 45 67 89 1011 1213 1415 16

CON2

Header 8X2

1 23 45 67 89 1011 1213 1415 16

CON3

Header 8X2

SW07SW08 SW09

12

P1

Header 2

12

P3

Header 2

12

P4

Header 2

SDA_MSDA

SCL_MSCL

SDB_MSDB1

2

P2

Header 2

PA0

PA03V

10KR50

20RR1220RR1320RR1420RR1520RR1620RR1720RR1820RR1920RR2020RR2120RR2220RR2320RR2420RR2520RR2620RR2720RR2820RR2920RR3020RR3120RR3220RR3320RR3420RR3520RR3620RR3720RR3820RR3920RR4020RR41

20RR720RR820RR920RR10

20RR4220RR4320RR4420RR45

Note1*

Figure 3: IS31FL3741A Application Schematic



D82RGB4P

D83RGB4P

D84RGB4P

D85RGB4P

D86RGB4P

D87RGB4P

D73RGB4P

D74RGB4P

SW1 SW2 SW3 SW4 SW5 SW6

D75RGB4P

D76RGB4P

D77RGB4P

D78RGB4P

D64RGB4P

D65RGB4P

D66RGB4P

D67RGB4P

D68RGB4P

D69RGB4P

D55RGB4P

D56RGB4P

D57RGB4P

D58RGB4P

D59RGB4P

D60RGB4P

D46RGB4P

D47RGB4P

D48RGB4P

D49RGB4P

D50RGB4P

D51RGB4P

D37RGB4P

D38RGB4P

D39RGB4P

D40RGB4P

D41RGB4P

D42RGB4P

D28RGB4P

D29RGB4P

D30RGB4P

D31RGB4P

D32RGB4P

D33RGB4P

D19RGB4P

D20RGB4P

D21RGB4P

D22RGB4P

D23RGB4P

D24RGB4P

D10RGB4P

D11RGB4P

D12RGB4P

D13RGB4P

D14RGB4P

D15RGB4P

D1RGB4P

D2RGB4P

D3RGB4P

D4RGB4P

D5RGB4P

D6RGB4P

SW1SW2SW3SW4SW5SW6

1 23 45 67 89 1011 1213 1415 16

P1

Header 8X2

1 23 45 67 89 1011 1213 1415 16

P3

Header 8X2

1 23 45 67 89 1011 1213 1415 16

P2

Header 8X2

D7RGB4P

D8RGB4P

D9RGB4P

D16RGB4P

D17RGB4P

D18RGB4P

D25RGB4P

D26RGB4P

D27RGB4P

D34RGB4P

D35RGB4P

D36RGB4P

D43RGB4P

D44RGB4P

D45RGB4P

D52RGB4P

D53RGB4P

D54RGB4P

D61RGB4P

D62RGB4P

D63RGB4P

D70RGB4P

D71RGB4P

D72RGB4P

D79RGB4P

D80RGB4P

D81RGB4P

D88RGB4P

D89RGB4P

D90RGB4P

D91RGB4P

D92RGB4P

D93RGB4P

D94RGB4P

D95RGB4P

D96RGB4P

D97RGB4P

D98RGB4P

D99RGB4P

D100RGB4P

D101RGB4P

D102RGB4P

D103RGB4P

D104RGB4P

D105RGB4P

D106RGB4P

D107RGB4P

D108RGB4P

D109RGB4P

D110RGB4P

D111RGB4P

D112RGB4P

D113RGB4P

D114RGB4P

D115RGB4P

D116RGB4P

D117RGB4P

SW7 SW8 SW9

SW7SW8SW9

CS_R1

CS_R2

CS_R3

CS_R4

CS_R5

CS_R6

CS_R7

CS_R8

CS_R9

CS_R10

CS_R11

CS_R12

CS_R13

CS_G1

CS_G2

CS_G3

CS_G4

CS_G5

CS_G6

CS_G7

CS_G8

CS_G9

CS_G10

CS_G11

CS_G12

CS_G13

CS_B1

CS_B2

CS_B3

CS_B4

CS_B5

CS_B6

CS_B7

CS_B8

CS_B9

CS_B10

CS_B11

CS_B12

CS_B13

CS_R1

CS_R2

CS_R3

CS_R4CS_R5

CS_R6CS_R7

CS_R8CS_R9

CS_R10CS_R11

CS_R12CS_R13

CS_G1CS_G2

CS_G3CS_G4

CS_G5CS_G6

CS_G7CS_G8

CS_G9CS_G10

CS_G11CS_G12

CS_G13

CS_B1

CS_B2CS_B3

CS_B4CS_B5

CS_B6CS_B7

CS_B8

CS_B9

CS_B10CS_B11

CS_B12CS_B13

Figure 4: FxLED_9x13_ARRAY Application Schematic



BILL OF MATERIALS

IS31FL3741A

Name Symbol Description Qty Supplier Part No.

LED Driver U1 Matrix LED Driver 1 Lumissil IS31FL3741A

LDO U2 Reduced voltage 1 SGMICRO SGM2019-3.3V

MCU U3 Microcontroller 1 STM STM32F103C8T6

Diode D1,D2 Diode, SMD 2 DIODES DFLS240

Crystal Y1 Crystal, 8MHz 1 JB HC-49S

Resistor R1,R2 RES,1k,1/10W,±5%,SMD 2 Yageo RC0603JR-071KL

Resistor R3,R4,R6 RES,100K,1/10W,±5%,SMD 3 Yageo RC0603JR-07100KL

Resistor R5,R46,R50 RES,10k,1/10W,±5%,SMD 3 Yageo RC0603JR-0710KL

Resistor R47 RES,1.5k,1/10W,±5%,SMD 1 Yageo RC0603JR-071K5L

Resistor R48,R49 RES,22R,1/10W,±5%,SMD 2 Yageo RC0603JR-0722RL

Resistor

R7,R8, R10,R11

~ R40, R41, R43, R44

RES,20R,1/10W,±5%,SMD 26 Yageo RC0603JR-0720RL

Resistor

R9,R12, R15,R18,

~ R42,R45

RES,20R,1/10W,±5%,SMD (Note 1)

13 Yageo RC0603JR-0720RL

Capacitor C1,C2,C3 CAP,0.1µF,16V,±20%,SMD 3 Yageo CC0603MRX7R7BB104

Capacitor C4,C6,C9 CAP,1µF,16V,±20%,SMD 3 Yageo CC0603KRX7R7BB105

Capacitor C5,C8 CAP,33pF,50V,±5%,SMD 2 Yageo CQ0603JRNPO9BN360

Capacitor C7 CAP,10nF,16V,±20%,SMD 1 Yageo CC0603KRX7R7BB103

Capacitor C10,C11 CAP,10uF,16V, ±20%,SMD 2 Yageo CC0805MKX5R7BB106

Button K1 Button SMD 1

Bill of Materials, refer to Figure 3 above.

FxLED 9x13 ARRAY

Name Symbol Description Qty Supplier Part No.

Diode D1~D117 RGB LED, SMD 117 Everlight 9-237/R6GHBHC-A01/2T Bill of Materials, refer to Figure 4 above.

Note 1: The value of these resistors on the evaluation board is 20Ω. For PVCC=5V and red LED application, prefer 51Ω for these resistors as shown in datasheet Figure 1.



0 0

00

2

1

2

1

2

1

2

1

2

4

6

8

10

12

1

3

5

7

9

11

1314

1516

1234567891011121314151617181920

24681012

135791113

14

15

16

2

4

6

8

10

12

1

3

5

7

9

11

1314

1516

1

2

4

3

0

0

0

0

1

1

Figure 5: Board Component Placement Guide - Top Layer

0 0

00

12

2

1

2

1

2

1

2

1

21

2 1

2 1

2

1

2 1

21

2

1

2

1

2

12

1 2

1

2

4

6

8

10

12

1

3

5

7

9

11

1314

1516

1234567891011121314151617181920

24681012

135791113

14

15

16

2

4

6

8

10

12

1

3

5

7

9

11

1314

1516

2 1

2 1

1

2

4

3

2

1

2

1

21

21

2 1

2 1

2 1

2 1

2 121

61

1

2

4

3

2121

2121

2121

2121

2121

2121

2121

2121

2 12 1

2 12 1

2 12 1

2 12 1

2 12 1

2 12 1

2 12 1

2 12 1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

0

0

0

0

1

1

Figure 6: Board PCB Layout - Top Layer



0 0

00

2

1

2

1

2

1

2

1

2

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6

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12

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1314

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1234567891011121314151617181920

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12

1

3

5

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9

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1314

1516

1

2

4

3

0

0

0

0

1

1

Figure 7: Board Component Placement Guide - Bottom Layer

0 0

00

12

2

1

2

1

2

1

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1

21

2 1

2 1

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2 1

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1 2

1

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2 1

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2

1

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21

2 1

2 1

2 1

2 1

2 121

61

1

2

4

3

2121

2121

2121

2121

2121

2121

2121

2121

2 12 1

2 12 1

2 12 1

2 12 1

2 12 1

2 12 1

2 12 1

2 12 1

2

1

2

1

2

1

2

1

2

1

2

1

2

1

0

0

0

0

1

1

Figure 8: Board PCB Layout - Bottom Layer



Figure 9: LED Board Component Placement Guide - Top Layer

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Figure 10: LED Board PCB Layout - Top Layer



Figure 11: LED Board Component Placement Guide - Bottom Layer

1

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15 13 11 9 7 5 3

246810121416

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Figure 12: LED Board PCB Layout - Bottom Layer

Copyright © 2021 Lumissil Microsystems. All rights reserved. Lumissil Microsystems reserves the right to make changes to this specification and its products at any time without notice. Lumissil Microsystems assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to obtain the latest version of this device specification before relying on any published information and before placing orders for products. Lumissil Microsystems does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Lumissil Microsystems receives written assurance to its satisfaction, that: a.) the risk of injury or damage has been minimized; b.) the user assume all such risks; and c.) potential liability of Lumissil Microsystems is adequately protected under the circumstances



REVISION HISTORY

Revision Detail Information Date

A Initial release 2019.09.05

B Update the Arduino Code 2021.08.31



APPENDIX Ⅰ: IS31FL3741A Arduino Test Code V01B

#include<Wire.h>

#include<avr/pgmspace.h>

#define Addr_GND 0x60

#define R 0xFF

#define G 0x00

#define B 0xFF

uint8_t i,j;

const PROGMEM byte PWM_Gama64[64]=

{

0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,

0x08,0x09,0x0b,0x0d,0x0f,0x11,0x13,0x16,

0x1a,0x1c,0x1d,0x1f,0x22,0x25,0x28,0x2e,

0x34,0x38,0x3c,0x40,0x44,0x48,0x4b,0x4f,

0x55,0x5a,0x5f,0x64,0x69,0x6d,0x72,0x77,

0x7d,0x80,0x88,0x8d,0x94,0x9a,0xa0,0xa7,

0xac,0xb0,0xb9,0xbf,0xc6,0xcb,0xcf,0xd6,

0xe1,0xe9,0xed,0xf1,0xf6,0xfa,0xfe,0xff

};

void setup() {

Wire.begin();

Wire.setClock(400000);//I2C 400KHz

Init_3741A(R, G, B);

}

void loop() {

IS31FL3741A_Test_mode1();//breath mode

}

void IS_IIC_WriteByte(uint8_t Dev_Add,uint8_t Reg_Add,uint8_t Reg_Dat)

{

Wire.beginTransmission(Dev_Add/2); // transmit to device IS31FL373x

Wire.write(Reg_Add); // sends regaddress

Wire.write(Reg_Dat); // sends regaddress

Wire.endTransmission(); // stop transmitting

}

void Init_3741A(uint8_t Rdata, uint8_t Gdata, uint8_t Bdata)

{

IS_IIC_WriteByte(Addr_GND,0xfe,0xc5);//unlock

IS_IIC_WriteByte(Addr_GND,0xfD,0x02);//write page 2

for(i=2;i<0xB4;i+=3)



{

IS_IIC_WriteByte(Addr_GND,i,Rdata);//R LED Scaling

}


{

IS_IIC_WriteByte(Addr_GND,i,Gdata);//G LED Scaling

}


{

IS_IIC_WriteByte(Addr_GND,i,Bdata);//B LED Scaling

}



for(i=2;i<0xAB;i+=3)

{

IS_IIC_WriteByte(Addr_GND,i,Rdata);//R LED Scaling

}


{

IS_IIC_WriteByte(Addr_GND,i,Gdata);//G LED Scaling

}


{

IS_IIC_WriteByte(Addr_GND,i,Bdata);//B LED Scaling

}



for(i=0;i<0xB4;i++)

{

IS_IIC_WriteByte(Addr_GND,i,0x00);//write all PWM set 0x00

}



for(i=0;i<0xAB;i++)

{

IS_IIC_WriteByte(Addr_GND,i,0x00);//write all PWM set 0x00

} //init all the PWM data to 0



IS_IIC_WriteByte(Addr_GND,0x01,0x7F);//global current

IS_IIC_WriteByte(Addr_GND,0x36,0x0B);//PWM frequency setting

IS_IIC_WriteByte(Addr_GND,0x00,0x01);//normal operation

}



void IS31FL3741A_Test_mode1(void)//

{

IS_IIC_WriteByte(Addr_GND,0xFD,0x00);//write frist frame

for (j=0;j<64;j++)//all LED ramping up

{



for(i=0;i<0xB4;i++)

{

IS_IIC_WriteByte(Addr_GND,i,pgm_read_byte_near(&PWM_Gama64[j]));//set all PWM

}



for(i=0;i<0xAB;i++)

{

IS_IIC_WriteByte(Addr_GND,i,pgm_read_byte_near(&PWM_Gama64[j]));//set all PWM

}

delay(10);//10ms

}

delay(1000); //keep on 1s

for (j=63;j>0;j--)//all LED ramping down

{



for(i=0;i<0xB4;i++)

{

IS_IIC_WriteByte(Addr_GND,i,pgm_read_byte_near(&PWM_Gama64[j-1]));//set all PWM

}



for(i=0;i<0xAB;i++)

{

IS_IIC_WriteByte(Addr_GND,i,pgm_read_byte_near(&PWM_Gama64[j-1]));//set all PWM

}

delay(10);//10ms

}

delay(500); //keep off 0.5s

}

Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information: ISSI:

IS31FL3741A-QFLS4-EB

https://www.mouser.com/lumissil

https://www.mouser.com/access/?pn=IS31FL3741A-QFLS4-EB

39×9 DOTS MATRIX LED DRIVER

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