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HT16K33

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

Ke�scan Timing......................................................................................................................18

Ke�scan & 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