Related Manuals for Texas Instruments TLC694 Series
Summary of Contents for Texas Instruments TLC694 Series
- Page 1 TI Information — Selective Disclosure TLC694x 16-Channel LED Driver Technical Reference Manual Technical Reference Manual Literature Number: SLVUBF4A February 2018 – Revised June 2019...
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Page 2: Table Of Contents
....................TLC6946 Design Example ..................... 4.1.1 Design Requirements ..................4.1.2 FC Register Configuration ..................4.1.3 PWM Grayscale Control ....................TLC6948 Design Example Contents SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... - Page 3 TI Information — Selective Disclosure www.ti.com ..................... 4.2.1 Design Requirements .................... 4.2.2 FC Registers Settings ..................4.2.3 PWM Grayscale Control SLVUBF4A – February 2018 – Revised June 2019 Contents Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated...
- Page 4 14-Bit GS Data for the TLC6946 Device ..................... 4-3. TLC6948 LED Display Board ....................4-4. 13-bit GS Data for TLC6948 List of Figures SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated...
- Page 5 4-13. Function-Control Registers For Red Color LEDs ..............4-14. Function-Control Registers For Green Color LEDs ..............4-15. Function-Control Registers For Blue Color LEDs SLVUBF4A – February 2018 – Revised June 2019 List of Tables Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated...
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Page 6: Preface
Related Documentation From Texas Instruments For a complete listing of related documentation and development-support tools for these devices, visit the Texas Instruments Web site at http://www.ti.com. Trademarks All trademarks are the property of their respective owners. -
Page 7: Introduction
– Low-Grayscale Uniformity Improvement – Low-Grayscale Coupling-Issue Elimination – Ghosting Removal – Caterpillar Elimination • High-Speed Serial-Data Interface – Data Transfer Rate: 33 MHz (max) SLVUBF4A – February 2018 – Revised June 2019 Introduction Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 8: Applications
Device 3 GSCLK GCLK GCLK GCLK DATA BACK IREF IREF IREF IREF IREF IREF Figure 1-1. Typical Application Schematic of TLC6946 With 32-Multiplexing Introduction SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 9: Typical Application Schematic Of Tlc6948 With 48-Multiplexing
Device 3 GSCLK GCLK GCLK GCLK DATA BACK IREF IREF IREF IREF IREF IREF Figure 1-2. Typical Application Schematic of TLC6948 With 48-Multiplexing SLVUBF4A – February 2018 – Revised June 2019 Introduction Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 10: Function Control
GS Bit 12 GS Bit 13 GS Bit 14 GS Bit 15 Figure 2-1. Common Shift Register and Data Latch Configuration Function Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 11: Function-Control Register 1 (Fc1)
1111b = Highest enhancement LODRM_EN Set the LED-open caterpillar-removal function. 0b = LOD removal function is disabled. 1b = LOD removal function is enabled. SLVUBF4A – February 2018 – Revised June 2019 Function Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 12: Function-Control Register 2 (Fc2)
1b = Dual-edge (both rising- and falling-edge) operating mode PSM_EN Set the mode of the power-save function. 0b = Power-save function is disabled. 1b = Power-save function is enabled. Function Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 13: Function-Control Register 3 (Fc3)
Set the number of TLC6948 scan lines. Table 2-7 for details about setting the number of TLC6948 scan lines. This bit is reserved LOW in TLC6946 device. SLVUBF4A – February 2018 – Revised June 2019 Function Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 14: Function-Control Register 4 (Fc4)
Function-control register 4 (FC4) is used to set the precharge and one-shot operating modes. Table 2-8 shows the bit assignments for the FC4 register. Function Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 15: Fc4 Register
00b to 11b. 00b = Lowest de-coupling enhancement … 11b = Highest de-coupling enhancement RESERVED 0000b Reserved SLVUBF4A – February 2018 – Revised June 2019 Function Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 16: Function-Control Commands
Old FC1 Data New FC1 Data Other FCx FCx Data (x = 2, 3, 4) Figure 2-6. WRTFC_EN Command and WRTFC1 Command Function Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 17: Read Function-Control Register
SOUT, synchronized with SCLK rising edge. Figure 2-10 Figure 2-13 show the timing diagrams of function-control data-read commands. SLVUBF4A – February 2018 – Revised June 2019 Function Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 18: Readfc1 Command
16-bit FC2 data are copied to 16-bit common shift register at the LAT falling edge (8 SCLK rising edges must be input while LAT is high) Figure 2-11. READFC2 Command Function Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 19: Readfc3 Command
16-bit FC4 data are copied to 16-bit common shift register at the LAT falling edge (12 SCLK rising edges must be input while LAT is high) Figure 2-13. READFC4 Command SLVUBF4A – February 2018 – Revised June 2019 Function Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 20: Function-Control Description
Table 2-12. Maximum Constant Current vs External Resistor R IREF (mA) (kΩ, typ) OLCmax IREF 1.02 1.28 1.71 2.56 5.12 10.7 Function Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 21: Led Open Detection (Lod)
After that, input 16 SCLK rising edges to shift out the LOD data at the SOUT pin. Figure 2-16 shows the timing diagram of the read-LOD-information operation. SLVUBF4A – February 2018 – Revised June 2019 Function Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 22: Read Lod Data
16-bit LOD data in LOD holder are copied to 16-bit common shift register at the LAT falling edge Figure 2-16. Read LOD Data Function Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 23: Led-Open Detection Process
LED is selected. Figure 2-18 shows the mechanism of LED open caterpillar phenomenon. SLVUBF4A – February 2018 – Revised June 2019 Function Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 24: Precharge Function
The device total power supply current, I , is typical 1 mA in power-save mode. Function Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 25: Thermal Shutdown (Tsd)
IREF pin voltage is lower than 0.19 V (typical). When the IREF pin voltage goes higher than 0.325 V (typical), the TLC694x device resumes normal operation. SLVUBF4A – February 2018 – Revised June 2019 Function Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 26: Pwm Grayscale Control
With this method, the TLC694x device can display the current frame image at a very high refresh rate, without any data-transfer-rate barrier. See Figure 3-1 for more details about the BANK-selection exchange operation. PWM Grayscale Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 27: Detail Of Memory Bank
32, then 512 (32 × 16 = 512) memory units must be written during each frame period. Figure 3-2 shows the detailed memory structure of the TLC694x device. SLVUBF4A – February 2018 – Revised June 2019 PWM Grayscale Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 28: Tlc694X Memory-Unit Structure
(1) n = 31 for the TLC6946 device, and n = 47 for the TLC6948 device Figure 3-2. TLC694x Memory-Unit Structure PWM Grayscale Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 29: Write Grayscale Data Into One Memory Unit
Bit 10 Bit 11 Bit 12 Bit 13 Bit 14 Bit 15 Figure 3-3. Write Grayscale Data Into Selected Memory Unit SLVUBF4A – February 2018 – Revised June 2019 PWM Grayscale Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 30: Write Grayscale Data Into One Memory Bank
BANKs, then the new image in the other BANK is displayed in the coming frame period. PWM Grayscale Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 31: Send Vsync Command
255 / 65 535 = 0.3891% (Assume 100% brightness if OUTn turns on for 65 535 GCLK periods during one display period). SLVUBF4A – February 2018 – Revised June 2019 PWM Grayscale Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 32: Enhanced Spectrum Pwm (Es Pwm) Control
= 1 / t refresh sub-period where • is the visual refresh rate refresh • is the time of one sub-period needed sub-period PWM Grayscale Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 33: Conventional 8+8 Mode Of Es Pwm (Static)
Supply Line Control Switcher « « « « « SW 31 Figure 3-7. TLC6946 Multiplexed 8+8 Mode of ES PWM (32-Multiplexing) SLVUBF4A – February 2018 – Revised June 2019 PWM Grayscale Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 34: Tlc6948 Multiplexed 8+8 Mode Of Es Pwm (48-Multiplexing)
7+9 mode of ES PWM and the TLC694x multiplexed 7+9 mode of ES PWM. The time of one sub-period determines the visual refresh rate, calculated as Equation PWM Grayscale Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 35: Conventional 7+9 Mode Of Es Pwm (Static)
Supply Line Control Switcher « « « « « SW31 Figure 3-10. TLC6946 Multiplexed 7+9 Mode of ES PWM (32-Multiplexing) SLVUBF4A – February 2018 – Revised June 2019 PWM Grayscale Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 36: Send Gclk For Multiplexing
Start writing GS data to another bank of display memory for the next frame image. Figure 3-12. Timing Sequence for 32-Multiplexing PWM Grayscale Control SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 37: Complete Frame Image Display
When the period of one frame ends, the external controller sends the VSYNC command to complete the current frame and start the new frame display. See Figure 3-12 Figure 3-13. SLVUBF4A – February 2018 – Revised June 2019 PWM Grayscale Control Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 38: Device Operation Examples
LEDs 30 Lines 90 Lines of LEDs of LEDs 30 Lines of LEDs Figure 4-1. TLC6946 LED Display Board Device Operation Examples SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 39: Tlc6946 System Structure
2. Use different resistors for the red, green, and blue LEDs, and use the BC register to fine-tune the current for each color. SLVUBF4A – February 2018 – Revised June 2019 Device Operation Examples Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 40: Fc Register Configuration
0011 1100 1110 1010b 3CEAh 0000 0000 0000 0000b 0000h Table 4-8 shows the FC1 to FC4 register value for blue color LED. Device Operation Examples SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 41: Pwm Grayscale Control
GS data bits to send to the device for each GS data latch operation. Data N 16 16 where N is the number of cascaded TLC6946 devices SLVUBF4A – February 2018 – Revised June 2019 Device Operation Examples Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... - Page 42 4. At the same time as step 3, send the next frame of GS data into the device the same as in step 1. 5. Repeat step 1 through step 4 until all the display frames are complete. Device Operation Examples SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated...
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Page 43: Tlc6948 Design Example
MOSFETs control the power supply for the 45-line LED anodes; 15 TLC6948 devices are cascaded to drive 80 RGB LEDs. SLVUBF4A – February 2018 – Revised June 2019 Device Operation Examples Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 44: Tlc6948 System Structure
REGISTER VALUE (BIN) REGISTER VALUE (HEX) REGISTER 0110 0110 0000 1000b 6608h 0100 0000 1010 0001b 40A1h 1100 1101 0110 0010b CD62h Device Operation Examples SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... -
Page 45: Function-Control Registers For Green Color Leds
240 SCLK rising edges are required to shift the FC3 register data to all devices. SLVUBF4A – February 2018 – Revised June 2019 Device Operation Examples Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated... - Page 46 4. At the same time as Step 3, send the next frame of GS data into the device the same as in step 1. 5. Repeat Step 1 through Step 4 until all the display frames are complete. Device Operation Examples SLVUBF4A – February 2018 – Revised June 2019 Submit Documentation Feedback Copyright © 2018–2019, Texas Instruments Incorporated...
- Page 47 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2019, Texas Instruments Incorporated...