Datasheet

ManualsBrandsSeeed Studio ManualsDevelopment Boards & KitsGrove - Red LED Matrix with Driver

Rev. 1.10 22 May 16, 2011 Rev. 1.10 23 May 16, 2011

HT16K33

RAM Mapping 16*8 LED Controller Driver with keyscan

●

If a diode is not available, not only the key data may not be read normally but the LED display

may be affected or the ICs may be damaged.

For example, if SW1 and SW2 are ON and KS0 has been selected (high level) as shown below,

this will cause not only current I1 which is supposed to run but also a short-circuit current I2 of

KS0 to KS1 to ow.

It is possible that this will then cause the following two problems:

(1) Since the level to K2 is not correctly sent, the key data cannot be latched correctly.

(2) Since the short-circuited current (current I2) of KS1 (high level) to KS1 (low level) ows, the

device may be damaged.

KS0

KS1

KS2

K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11 K12 K13

SW1

SW2

Select

{

Non

select

Key matrix combination with 28 pin package

● Without INT pin

COM1/KS0

COM2/KS1

COM3/KS2

SEG3/K1

SEG4/K2

SEG5/K3

SEG6/K4

SEG7/K5

SEG8/K6

SEG9/K7

SEG10/K8

SEG11/K9

SEG12/K10

SEG14/K12

SEG15/K13

SEG13/K11

● With INT pin