Datasheet

Rev. 1.10 34 May 16, 2011 Rev. 1.10 35 May 16, 2011
HT16K33
RAM Mapping 16*8 LED Controller Driver with keyscan
Application Circuit
● 16*8 display application: (No INT pin function and 13*3 key function)
LED matrix
SCL
SDA
VDD
VSS
MCU
VDD
VSS
HT16K33
VSS
0.1uF
COM0
COM1/KS0
COM2/KS1
COM3/KS2
COM4
COM5
COM6
COM7
VDD
Row13/K11
Row14/K12
Row12/K10
Row11/K9
Row10/K8
Row9/K7
Row8/K6
Row7/K5
Row6/K4
Row5/K3
Row4/K2
Row3/K1
Row2/A0
Row1/A1
Row0/A2
Row15/K13/INT
39KΩ*13
=
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
4.7KΩ4.7KΩ
R
A0
R
A1
R
A2
Note: 1. If R
A0
, R
A1
and R
A2
are Open, the I
2
C slave address (A0~A2) is set to low.
2. If R
A0
, R
A1
and R
A2
are 39KΩ, the I
2
C slave address (A0~A2) is set to high.
3. If the key input is not used for LED display, the resistor in series with the key input (R1~R13) can be
omitted.
● 15*8 display application: (INT pin function and 12*3 key function)
LED matrix
SCL
SDA
VDD
VSS
MCU
VDD
VSS
HT16K33
VSS
0.1uF
=
COM0
COM1/KS0
COM2/KS1
COM3/KS2
COM4
COM5
COM6
COM7
VDD
Row13/K11
Row14/K12
Row15/K13/INT
Row12/K10
Row11/K9
Row10/K8
Row9/K7
Row8/K6
Row7/K5
Row6/K4
Row5/K3
Row4/K2
Row3/K1
Row2/A0
Row1/A1
Row0/A2
39KΩ*12
4.7KΩ4.7KΩ
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R
A0
R
A1
R
A2
Note: 1. If R
A0
, R
A1
and R
A2
are Open, the I
2
C slave address (A0~A2) is set to low.
2. If R
A0
, R
A1
and R
A2
are 39KΩ, the I
2
C slave address (A0~A2) is set to high.
3. If the key input is not used for LED display, the resistor in series with the key input (R1~R12) can be
omitted.