Datasheet

Rev. 1.10 32 May 16, 2011 Rev. 1.10 33 May 16, 2011
HT16K33
RAM Mapping 16*8 LED Controller Driver with keyscan
● Key data read
no
yes
Start
Int flag bit =1 ?
Read Key data
Next processing
row/int select Register set
INT / ROW bit=1?
yes no
Clear int flag
and the key data RAM
no
yes
Int pin bit =1 ?
Read Key data
Next processing
INT pin is set to low level
and clears the key data RAM
no
yes
Int pin bit =0 ?
Read Key data
Next processing
INT pin is set to high level
and clears the key data RAM
“act” bit is set to “0”=?
yes
no
Read Key data
Next processing
Clear int flag
and clears the key data RAM
no