Texas Instruments TLC6948 Manuals

Manuals and User Guides for Texas Instruments TLC6948. We have 1 Texas Instruments TLC6948 manual available for free PDF download: Technical Reference Manual

Texas Instruments TLC6948 Technical Reference Manual (47 pages)

16-Channel LED Driver

Brand: Texas Instruments | Category: Control Unit | Size: 0 MB

Table of Contents
2
Preface
6
Introduction
7
Overview
7
Features
7
Applications
8
Typical Application Schematic
8
Typical Application Schematic of TLC6946 with 32-Multiplexing
8
Typical Application Schematic of TLC6948 with 48-Multiplexing
9
Function Control
10
Function-Control Registers
10
Write Function-Control Data through a Common Shift Register
10
Common Shift Register and Data Latch Configuration
10
Function-Control Register 1 (FC1)
11
FC1 Register
11
FC1 Access Type Codes
11
FC1 Register Field Descriptions
11
Function-Control Register 2 (FC2)
12
FC2 Register
12
FC2 Register Field Descriptions
12
Function-Control Register 3 (FC3)
13
FC3 Register
13
LGSC1 GCLK Period
13
FC3 Register Field Descriptions
13
Function-Control Register 4 (FC4)
14
Number of TLC6946 Scan Lines
14
Number of TLC6948 Scan Lines
14
FC4 Register
15
FC4 Register Field Descriptions
15
Function-Control Commands
16
Write Function-Control Register
16
WRTFC_EN Command and WRTFC1 Command
16
Description of Commands to Write Function-Control Data
16
Read Function-Control Register
17
WRTFC_EN Command and WRTFC2 Command
17
WRTFC_EN Command and WRTFC3 Command
17
WRTFC_EN Command and WRTFC4 Command
17
READFC1 Command
18
READFC2 Command
18
Description of Commands to Read Function-Control Data
18
READFC3 Command
19
READFC4 Command
19
Function-Control Description
20
Global Brightness Control and Current Setting
20
Global BC Data Vs Constant-Current Ratio and Set Current Value
20
LED Open Detection (LOD)
21
LED Open-Detection Circuit
21
Bit Arrangement in the LOD Data Register
21
Read LOD Data
22
Description of READLOD Command
22
LED-Open Detection Process
23
Precharge Function
24
Power-Save Mode (PSM)
24
Caterpillar Issue
24
Thermal Shutdown (TSD)
25
IREF Resistor Short Protection (ISP)
25
Power-Save Mode
25
PWM Grayscale Control
26
Write Grayscale Data into Memory
26
Memory Structure Overview
26
Detail of Memory BANK
27
BANK-Selection Exchange Operation
27
Tlc694X Memory-Unit Structure
28
Write Grayscale Data into One Memory Unit
29
Write Grayscale Data into Selected Memory Unit
29
WRTGS Command Description
29
Write Grayscale Data into One Memory BANK
30
Vertical Frame Synchronization (VSYNC)
30
VSYNC Command
30
Write Grayscale Data into Selected Memory BANK
30
Send VSYNC Command
31
PWM Control and New Frame Image Display
31
PWM Control Overview
31
VSYNC Command Description
31
Enhanced Spectrum PWM (es PWM) Control
32
Conventional 8+8 Mode of es PWM (Static)
33
TLC6946 Multiplexed 8+8 Mode of es PWM (32-Multiplexing)
33
TLC6948 Multiplexed 8+8 Mode of es PWM (48-Multiplexing)
34
Conventional 7+9 Mode of es PWM (Static)
35
TLC6946 Multiplexed 7+9 Mode of es PWM (32-Multiplexing)
35
Send GCLK for Multiplexing
36
TLC6948 Multiplexed 7+9 Mode of es PWM (48-Multiplexing)
36
Timing Sequence for 32-Multiplexing
36
Complete Frame Image Display
37
Timing Sequence for 48-Multiplexing
37
Device Operation Examples
38
TLC6946 Design Example
38
Design Requirements
38
TLC6946 LED Display Board
38
TLC6946 Design Parameters
38
TLC6946 System Structure
39
SCLK and GCLK Frequency
39
FC Register Configuration
40
Channel Current and Brightness Control Method 1
40
Channel Current and Brightness Control Method 2
40
Function-Control Registers for Red Color Leds
40
Function-Control Registers for Green Color Leds
40
PWM Grayscale Control
41
Function-Control Registers for Blue Color Leds
41
TLC6948 Design Example
43
TLC6948 LED Display Board
43
TLC6948 Design Parameters
43
TLC6948 System Structure
44
Channel Current and Brightness Control Settings
44
Function-Control Registers for Red Color Leds
44
Function-Control Registers for Green Color Leds
45
Function-Control Registers for Blue Color Leds
45

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