Datasheet

Rev. 1.10 30 May 16, 2011 Rev. 1.10 31 May 16, 2011
HT16K33
RAM Mapping 16*8 LED Controller Driver with keyscan
Command Summary
Name
Command / Address
Option Description Def.
D15 D14 D13 D12 D11 D10 D9 D8
Display
data
Address
pointer
0 0 0 0 A3 A2 A1 A0
{A0~A3}
R/W
● Five bits of immediate data, bits A0 to A3,
are transferred to the data pointer to dene
one of sixteen display RAM addresses.
● If the Display data register address (An)
is 0X00h ~ 0X0Fh, after reaching the
memory location 0X0Fh, the pointer will
reset to 0X00h
00H
System
setup
0 0 1 0 X X X S
{S}
Write only
Denes internal system oscillator on/off
● {0}:Turn off System oscillator (standby
mode)
● {1}:Turn on System oscillator (normal
operation mode)
20H
Key data
Address
pointer
0 1 0 0 0 K2 K1 K0
{K0~K2}
Read only
● Three bits of immediate data, bits K0 to
K2, are transferred to the data pointer to
dene one of six key data RAM addresses.
● It is strongly recommended that the key
data RAM of address 0x40H~0x45H
should be read continuously and in one
operation, so the key data RAM of address
should be started at 0x40H only.
● If the Key data register address (An) is
0X40h ~ 0X45h, after reaching the memory
location 0X45h, the pointer will reset to
0X40h
40H
INT ag
Address
pointer
0 1 1 0 0 0 0 0
Read only
Denes the INT ag address, Read INT ag
status.
Interrupt flag signal output. When any key
matrix key is pressed, after the completion of
two key scan cycles, this int ag bit goes to a
high level and remains at a high level until all
key data has been read,
60H
Display
setup
1 0 0 0 X B1 B0 D
{D}
Write only
Denes Display on/off status.
● {0}: Display off
● {1}: Display on
80H
{B1,B0}
Write only
Denes the blinking frequency
● {0,0} = Blinking OFF
● {0,1} = 2HZ
● {1,0} = 1HZ
● {1,1} = 0.5HZ
Note: If programmed command data is not dened, the function will not be affected.