Datasheet

Rev. 1.10 PB May 16, 2011 Rev. 1.10 i May 16, 2011
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
Standby Mode ..........................................................................................................................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
Keyscan Timing ......................................................................................................................18
Keyscan & INT Timing ............................................................................................................ 18
Key Data Memory – RAM Structure ........................................................................... 21
KEY MATRIX CONFIGURATION
................................................................................. 22
When pressing three or more times is assumed: ...................................................................22
When pressing twice or more times is assumed: ...................................................................22
Key matrix combination with 28 pin package .........................................................................23
Key matrix combination with 24 pin package .........................................................................24