TLC6989 datasheet(46/72 Pages) TI1

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8 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

8.1 Application Information

The TLC6989 is controlled using a standard SPI. The device is connected to a daisy chain of TLC698x devices

which are controlled using a Continuous Clock Serial Interface (CCSI) provided by the TLC6989 device. All the

features of the TLC6989 are accessed by programmable registers.

8.2 Typical Application

Figure 8-1 depicts a typical application with only one TLC6989 connected to a Controller using one SPI bus and

many TLC698x connected in a daisy chain using one CCSI bus.

TLC6989

VCC

SIN

SCLK

GND

CLK_O

SOUT

FAULT

SDI

SDO

DRDY

VCC

TLC6984

VLEDG

...

SIN

SCLK

VCC

SOUT

GND

SIN

SCLK

IREF

VCC

SOUT

GND

IREF

VLEDR

VCC

VLEDR

VLEDG/B

...

TLC6984

32 RGBs

VLEDB

VLEDG

VLEDR

VLEDB

...

Red LED

Green LED

Blue LED

Figure 8-1. Typical Application Schematics

8.2.1 Design Requirements

Table 8-1. Design Parameters

PARAMETER

VALUE

VCC

2.8V

Frame rate

30Hz

Brightness resolution

16 bits

Cascaded devices number

Number of scan lines

fSPI

8MHz

TLC6989

SLVSHF5 – NOVEMBER 2024

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