HT16K23 datasheet(4/30 Pages) HOLTEK

4 / 30 page

Rev. 1.10

July 01, 2011

HT16K23

Pin Description

Pin Name

Type

Description

SDA

I/O Serial Data Input/Output for I2C interface.

SCL

Serial Clock Input for I2C.

VDD

—

Positive power supply for logic circuits.

VSS

—

Negative power supply for logic circuits, ground.

COM0 ~ COM3

LCD Common output.

SEG0/K0 ~

SEG14/K14

I/O ● LCD Segment output.

● Key data input, internal pull-low during key scan.

SEG15/K15/INT

I/O

● When the “M” bit of the mode set command is set to “1”, and the

“INT/ROW” bit of the mode set command is set to “0”, this pin

becomes an LCD Segment output and key data input with internal

pull-low during key scan.

● When the “M” bit of the mode set command is set to “1”, and the

“INT/ROW” bit of the mode set command is set to “1”, this pin

becomes an INT pin, interrupt signal out. INT is output active-low

when the “ACT” bit of mode set command is set to “0”, The INT

output is active-high when the “ACT” bit of the mode set command

is set to “1”

SEG16/COM7/K16 ~

SEG18/COM5/K18

I/O

● When the “M” bit of the mode set command is set to “0”, this

pin becomes an LCD Segment output and a key data input with

internal pull-low during a key scan.

● When the “M” bit of the mode set command is set to “1”, this pin

becomes an LCD Common output.

SEG19/COM4/K19/INT

I/O

● When the “M” bit of the mode set command is set to “0”, and the

“INT/ROW” bit of the mode set command is set to “0”, this pin

becomes a LCD Segment output and a key data input with internal

pull-low during key scan.

● When the “M” bit of the mode set command is set to “0”, and the

“INT/ROW” bit of the mode set command is set to “1”, this pin

becomes an INT pin, interrupt signal out. The INT output is active-

low when the “ACT” bit of the mode set command is set to “0”,

The INT output active-high when the “ACT” bit of the mode set

command is set to “1”

● When the “M” bit of the mode set command is set to “1”, this pin

becomes an LCD Common output.

HT16K23 Datasheet(PDF) 4 Page - Holtek Semiconductor Inc

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