HT16K23
RAM Mapping 20*4/16*8 LCD Controller Driver with keyscan
Pin Description
Pin Name
SDA
SCL
V
DD
V
SS
CO�½0 ~ CO�½3
SEG0/K0 ~
SEG14/K14
Type
I/O
I
—
—
O
I/O
Se�½ial Clo�½k Input fo�½ I
�½
C.
Positive powe�½ supply fo�½ logi�½ �½i�½�½uits.
Negative powe�½ supply fo�½ logi�½ �½i�½�½uits�½ g�½ound.
LCD Common output.
●
LCD Segment output.
●
Key data input�½ inte�½nal pull-low du�½ing key s�½an.
●
W�½en t�½e “�½” bit of t�½e mode set �½ommand is set to “1”�½ and t�½e
“INT/ROW” bit of t�½e mode set �½ommand is set to “0”�½ t�½is pin
be�½omes an LCD Segment output and key data input wit�½ inte�½nal
pull-low du�½ing key s�½an.
●
W�½en t�½e “�½” bit of t�½e mode set �½ommand is set to “1”�½ and t�½e
“INT/ROW” bit of t�½e mode set �½ommand is set to “1”�½ t�½is pin
be�½omes an INT pin�½ inte�½�½upt signal out. INT is output a�½tive-low
w�½en t�½e “ACT” bit of mode set �½ommand is set to “0”�½ T�½e INT
output is a�½tive-�½ig�½ w�½en t�½e “ACT” bit of t�½e mode set �½ommand
is set to “1”
●
W�½en t�½e “�½” bit of t�½e mode set �½ommand is set to “0”�½ t�½is
pin be�½omes an LCD Segment output and a key data input wit�½
inte�½nal pull-low du�½ing a key s�½an.
●
W�½en t�½e “�½” bit of t�½e mode set �½ommand is set to “1”�½ t�½is pin
be�½omes an LCD Common output.
●
W�½en t�½e “�½” bit of t�½e mode set �½ommand is set to “0”�½ and t�½e
“INT/ROW” bit of t�½e mode set �½ommand is set to “0”�½ t�½is pin
be�½omes a LCD Segment output and a key data input wit�½ inte�½nal
pull-low du�½ing key s�½an.
●
W�½en t�½e “�½” bit of t�½e mode set �½ommand is set to “0”�½ and t�½e
“INT/ROW” bit of t�½e mode set �½ommand is set to “1”�½ t�½is pin
be�½omes an INT pin�½ inte�½�½upt signal out. T�½e INT output is a�½tive-
low w�½en t�½e “ACT” bit of t�½e mode set �½ommand is set to “0”�½
T�½e INT output a�½tive-�½ig�½ w�½en t�½e “ACT” bit of t�½e mode set
�½ommand is set to “1”
●
W�½en t�½e “�½” bit of t�½e mode set �½ommand is set to “1”�½ t�½is pin
be�½omes an LCD Common output.
Description
Se�½ial Data Input/Output fo�½ I
�½
C inte�½fa�½e.
SEG15/K15/INT
I/O
SEG16/CO�½7/K16 ~
SEG18/CO�½5/K18
I/O
SEG19/CO�½4/K19/INT
I/O
Rev. 1.00
7
�½a�½�½�½ 0�½�½ �½011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
