Datasheet HT16D31A/HT16D31B (Holtek) - 2

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HT16D31A/HT16D31B HT16D31A/HT16D31B 8×9 Constant Current LED Driver 8×9 Constant Current LED Driver Table of Contents Features .. 4 Applications ... 4 General Description ... 4 Selection Table ... 5 Block Diagram .. 5 Pin Assignment .. 5 Pin Description .. 6 Approximate Internal Connections .. 6 Absolute Maximum Ratings .. 7 D.C. Characteristics ... 7 A.C. Characteristics ... 8 A.C. Characteristics – SPI 3-wire Serial Bus ... 9 A.C. Characteristics – I2C Serial Bus ... 9 Timing Diagrams .. 10
SPI 3-Wire Serial Bus Timing ...10 I2C Bus Timing ..10 Power on Reset Timing ..10
Functional Description .. 11
Power-on Reset ...11 LED Driver ..11 System Oscillator ...11 Driver Outputs ..11 Address Pointer ..11
Open/Short Detection Function .. 12
Over Temperature Protection ...13 Constant Current Output ..13 Load Supply Voltage – LED_VDD ...14 Display Data RAM – DDRAM ...14 Fade Data RAM ...18 LED On/Off Control RAM Data ..19
Command Description ..19
Command Table ...19 Software Reset ...21 RAM Page Address Set ...22 Picture Start Page Address ..23 Movie Start Page Address ..23 Movie Playing Length Set ..24 Movie Cycle Time Set ..24 Movie Page Delay Time ...25 Rev. 1.10 2 April 11, 2019 Rev. 1.10 3 April 11, 2019 Document Outline Features Applications General Description Selection Table Block Diagram Pin Assignment Pin Description Approximate Internal Connections Absolute Maximum Ratings D.C. Characteristics A.C. Characteristics A.C. Characteristics – SPI 3-wire Serial Bus A.C. Characteristics – IC Serial Bus Timing Diagrams SPI 3-Wire Serial Bus Timing I2C Bus Timing Power on Reset Timing Functional Description Power-on Reset LED Driver System Oscillator Driver Outputs Address Pointer Open/Short Detection Function Over Temperature Protection Constant Current Output Load Supply Voltage – LED_V Display Data RAM – DDRAM Fade Data RAM LED On/Off Control RAM Data CommandDescription Command Table Software Reset RAM Page Address Set Picture Start Page Address Movie Start Page Address Movie Playing Length Set Movie Cycle Time Set Movie Page Delay Time Last Page Set Picture Scrolling Control Display Mode Configuration Mode Fade Function Control Global Fade Time Cascade Mode System Control Constant Current Ratio Brightness Control Mode Control Blanking Control Voltage Setting Read Open Detection Data Read Short Detection Data Read Register Status Read Movie Frame Status Read Movie Loop Status Read Function Flag SPI 3-wire Serial Interface Write Operation Read Operation I2C Serial Interface Data Validity START and STOP Conditions Byte Format Acknowledge Slave Addressing Write Operation Read Operation Power Supply Sequence Operation Flow Charts Application Circuits LED Matrix Circuit RGB LED Matrix Circuit Single LED IC Application Cascade Function Cascade Control Flow Package Information 16-pin NSOP-EP (150mil) Outline Dimensions SAW Type 16-pin QFN (3mm×3mm for FP0.25mm) Outline Dimensions