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LP5890 Datasheet(PDF) 32 Page - Texas Instruments

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Part # LP5890
Description  LP5890 16 횞 48 LED Matrix Driver With Ultra-low Power
PDF  72 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LP5890 Datasheet(HTML) 32 Page - Texas Instruments

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R0/G0/B0, locating in line 1 of BANK A, is selected to restore the data transimitted the 17th time after VSYNC
command.
Repeat this operation for each line until the LINE_COUNT exceeds the number of scan lines set in the
SCAN_NUM (See FC0 register bit20-16 ) and all scan lines have been updated with new GS data, which means
one frame of GS data is restored into the memory BANK. Then the LINE_COUNT is reset to 0.
8.6.2 PWM Control for Display
In order to increase the refreash rate in time-multiplexing display system, an DS-PWM (Dynamic Spectrum-
Pulse Width Modulation) algorithm is proposed in this device. One frame is divided into many segments shown
as below. Note that one frame is divided into n sub-periods, n is set by SUBP_NUM (FC0 register bit23-21),
and each sub-period is divided into 32 segments for 32 scan lines. Each segment contains GS GCLKs time for
grayscale data display and T_SW GCLKs time for switching lines. GS is configured by the SEG_LENGTH (FC1
register bit9-0 in Table 8-8), and T_SW is the line switch time, which is configured by the LINE_SWT (see FC1
register bit 40-37 in Table 8-8).
LP5890
SLVSGD5 – JULY 2021
www.ti.com
32
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