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HT16K23 Datasheet(PDF) 13 Page - Holtek Semiconductor Inc

Part # HT16K23
Description  RAM Mapping 20*4/16*8 LCD Controller Driver with keyscan
PDF  33 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT16K23 Datasheet(HTML) 13 Page - Holtek Semiconductor Inc

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HT16K23
RAM Mapping 20*4/16*8 LCD Controller Driver with keyscan
System Set Command
This command is used to set the follow functions.
● The HT16K23 operates in normal mode or standby mode. Before the standby mode command is
sent, it is strongly recommended to read key data first.
● LCD display on/off
Name
Command
Option
Description
Def.
D7 D6 D5 D4 D3 D2 D1 D0
System
set
1
0
0
0
0
0
D
S
S
Standby mode sele�ting
● {0}: standby mode
● {1}: no�mal mode
80H
D
LCD display on/off
● {0}: LCD display off
● {1}: LCD display on
Mode Set Command
This command is used to set the follow functions.
● Display mode selecting, 20*4 display mode or 16*8 display mode.
● Set the HT16K23 SEG/INT port to be a segment output or an INT output.
● INT output is active-low or active-high.
Name
Command
Option
Description
Def.
D7 D6 D5 D4 D3 D2
D1 D0
�ode
set
1
0
1
0
0 ACT INT/
ROW �
�
LCD display mode sele�ting
● {0}: �0*4 display mode
● {1}:16*8 display mode
A0H
INT/
ROW
Segment o� INT pin sele�ting
● {0}: Segment output
SEG19/CO � 4/K19/INT is
segment output in �0*4 display
mode.
SEG15/K15/INT is segment
output in 16*8 display mode.
● {1}: INT output
SEG19/CO�4/K19/INT is INT
output in �0*4 display mode.
SEG15/K15/INT is INT output in
16*8 display mode.
ACT
INT output level sele�tion�
● {0}: INT output is a�tive-low.
● {1}: INT output is a�tive-�ig�.
System Oscillator
The internal logic and the LCD driver signals of the HT16K23 are timed by the integrated RC
oscillator.
The System Clock frequency (fSYS) determines the LCD frame frequency. A clock signal must
always be supplied to the device as removing the clock may freeze the standby mode command is
executed. At initial system power on, the System Oscillator is in the stop state.



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