Datasheet HT16D33A/HT16D33B (Holtek) - 5

HT16D33A/HT16D33B HT16D33A/HT16D33B 16×16 Constant Current LED Driver 16×16 Constant Current LED Driver General Description
The HT16D33A and HT16D33B are high accuracy constant current and memory mapping LED display controller/drivers. The maximum display capacity of the devices is 256 patterns composed of 16 rows and 16 commons. The devices can generate a 256 step Gray Scale (PWM data) using software controlled PWM circuitry and 256 LED illumination levels using software controlled PWM circuitry. The devices provide constant current output control using software controlled for each row output terminal. A serial interface is provided to allow the devices to receive instructions for its command mode and data mode. Only three lines are required for device interfacing to a host controller. The display capacity can be easily extended by cascading the devices thus expanding its application possibilities. The devices are compatible with most microcontrollers offering easy interfacing via their two serial interfaces, an I2C interface or an SPI 3-wire serial interface.
Selection Table Part Number Interface
HT16D33A 3-wire SPI HT16D33B I2C
Block Diagram
8 Brightness VDD Control LEDVDD VSS FADE CA0 Control 160 CSB/AD 4 CA1 CLK/SCL Filter I/F 8 Control CA2 DIO/SDA Circuit Display RAM 8 PWM 20 LED CA9 Control Output Driver CA10 CA11 SYNC Oscillator Timing CA12 Generator CA19 I-Reg LEDVSS Note: This block diagram is for explaining functions. Part of the block diagram may be omitted, or it may be simplified. Rev. 1.10 4 April 11, 2019 Rev. 1.10 5 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 – I2C 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_VDD Display Data RAM – DDRAM PWM Data WidthTiming Fade Data RAM LED On/Off Control RAM Data Command Description Command Table Software Reset RAM Page Address Set Picture Display Address Movie Display Start Address Movie Playing Length Movie Cycle Time 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 24-pin SSOP-EP (150mil) Outline Dimensions 28-pin SSOP (150mil) Outline Dimensions SAW Type 32-pin QFN (4mm×4mm×0.75mm) Outline Dimensions