Datasheet HT16D35A/HT16D35B (Holtek) - 6

HT16D35A/HT16D35B I2C Serial Bus A.C. Characteristics
Ta=25°C
VDD=2.4V to 5.5V VDD=3.0V to 5.5V Symbol Parameter Condition Unit Min. Max. Min. Max.
fSCL Clock frequency — — 100 — 400 kHz Time in which the bus must be tBUF Bus free time free before a new transmission 4.7 — 1.3 — μs can start tHD: STA Start condition hold time After this period, the first clock pulse is generated 4 — 0.6 — μs tLOW SCL Low time — 4.7 — 1.3 — μs tHIGH SCL High time — 4 — 0.6 — μs tSU: STA Start condition setup time Only relevant for repeated START condition 4.7 — 0.6 — μs tHD: DAT Data hold time — 0 — 0 — ns tSU: DAT Data setup time — 250 — 100 — ns tR SDA and SCL rise time Note — 1 — 0.3 μs tF SDA and SCL fall time Note — 0.3 — 0.3 μs tSU: STO Stop condition set-up time — 4 — 0.6 — μs tAA Output Valid from Clock — — 3.5 — 0.9 μs t Input Filter Time Constant SP (SDA and SCL Pins) Noise suppression time — 20 — 20 ns Note: These parameters are periodically sampled but not 100% tested.
Timing Diagrams SPI 3-Wire Serial Bus Timing
tCSW V 90% 90% DD CSB 10% 10% VSS tCSL tCLK tCSH V 90% 90% 90% 90% DD CLK tCW tCW 10% 10% 10% 10% VSS tDS tHS V 90% DD 90% DIO (INPUT ) 10% 10% VSS tPD tPD V 90% 90% DD DIO (OUTPUT ) 10% 10% VSS Rev. 1.00 6 July 12, 2017 Document Outline Features Applications General Description Selection Table Block Diagram Pin Assignment Pin Description 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 ROW Driver Outputs Column Driver Outputs Address Pointer Over Temperature Protection Constant Current Output Setting the Output Current Load Supply Voltage – LED_V Display Data RAM – DDRAM LED Driver Output Waveform Output Signal Timing Fade Data RAM Universal COM (UCOM) RAM Data Universal SEG (USEG) RAM Data Matrix Masking RAM Data Command Description – Command Table Software Reset Binary/Gray Select Number of COM Outputs Global Blinking Cascade Mode System Control Constant Current Ratio Global Brightness Mode Control Scrolling Control Scrolling Speed COM Pin Control ROW Pin Control Direct Pin Control Read Flag Read Status Write Display Data Write Fade Data Write UCOM Data Write USEG Data Write Matrix Masking Data SPI 3-wire Serial Interface I2C Serial Interface Power Supply Sequence Operation Flow Chart Application Circuits LED Matrix Circuit Single LED IC Application Cascade Function Cascade Control Flow Package Information 48-pin LQFP (7mm×7mm) Outline Dimensions (Exposed Pad)