LP5891 datasheet(19/74 Pages) TI

19 / 74 page

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LODVTH_R

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LODVTH_G

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LODVTH_B

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LODVTH_R

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LODVTH_G

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LODVTH_B

48-bit LOD Data

48-bit Common Shift Register

SCLK

SIN

SOUT

READLOD

48-bit

LSB

MSB

Channel

Control

Channel

Control

Channel

Control

Channel

Control

Channel

Control

Channel

Control

LOD Detection

0b - Normal

1b - LED-open

Figure 7-8. LED Open Detection Circuit

The LED open detection function records the position of the open LED, which contains the scan line number and

relevant channel number. The scan line order is stored LOD_LINE_WARN register (see FC16, FC17 for more

details), and the channel number is latched into the internal 48-bit LOD data register (see FC20 for more details)

at the end of each segment. Figure 7-9 shows the bit arrangement of the LOD data register.

Figure 7-9. Bit Arrangement in LOD Data Register

7.3.5.3.2 Read LED Open Information

The LOD readback function must be enabled before read LED open information. This function is enabled by

LOD_LSD_RB (see FC3 for more details).

Figure 7-10 shows the steps to read LED open information. Wait at least one sub-period time between Step2

and Step3 command.

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LP5891

SLDS269A – MARCH 2022 – REVISED MAY 2022

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