1427 Adafruit

RAM Mapping 16*8 LED Controller Driver with keyscan HT16K33 Revision: V.1.10 Date: aa 1 1 010111HT16K33 RAM Mapping 16*8 LED Controller Driver with keyscan Table of Contents Feature ........................................................................................................................... 1 Applications ................................................................................................................... 1 General Description ...................................................................................................... 1 Block Diagram ............................................................................................................... 2 Pin Assignment ............................................................................................................. 3 Pin Description .............................................................................................................. 4 Approximate Internal Connections .............................................................................. 5 Absolute Maximum Ratings ......................................................................................... 5 D.C. Characteristics ...................................................................................................... 6 A.C. Characteristics ...................................................................................................... 6 A.C. Characteristics ...................................................................................................... 7 Timing Diagrams ........................................................................................................... 7 Functional Description ................................................................................................. 8 Power-on Reset .......................................................................................................................8 Standb ode ..........................................................................................................................8 Wake-up ...................................................................................................................................9 System Setup Register ............................................................................................... 10 ROW/INT Set Register ................................................................................................. 10 Display Setup Register ............................................................................................... 11 System Oscillator ........................................................................................................ 12 Display Data Address Pointer .................................................................................... 12 Key Data Address Pointer .......................................................................................... 12 Register Information Address Pointer ....................................................................... 12 Row Driver Outputs ..................................................................................................... 12 Column Driver Outputs ............................................................................................... 12 Display Memory RAM Structure .............................................................................. 13 LED drive mode waveforms and scanning is as follows: ......................................................13 Digital Dimming Data Input ........................................................................................ 15 Keyscan ........................................................................................................................ 17 Kescan T iming ......................................................................................................................18 Kescan & INT Timing ............................................................................................................18 Key Data Memory RAM Structure ........................................................................... 21 KEY MATRIX CONFIGURATION ................................................................................. 22 When pressing three or more times is assumed: ................................................................... When pressing twice or more times is assumed: ................................................................... Ke matrix combination with 8 pin package .........................................................................3 Ke matrix combination with 4 pin package .........................................................................4 Rev. 1.10 PB a 1 011 Rev. 1.10 i a 1 011