Rev. 1.00

3

December 20, 2016

HT1628

Pin Description

Pin Name

Type

Description

VDD

—

Positive power supply

VLCD

—

LCD power input

VSS

—

Negative power supply, ground

VCAP

O

1/2 bias voltage output pin, connected to a capacitor

CSB

I

Chip select input with pull-high resistor

1. When high, the data and commands read from or written to the device are disabled.

The serial interface circuit is also reset.

2. When low, data and command transmissions between the host controller and the

device are all enabled.

RDB

I

READ clock input with pull-high resistor

Data in the RAM of the device are clocked out on the falling edge of the RDB signal. The

clocked out data will appear on the DATA line. The host controller can use next rising

edge to latch the clocked out data.

WRB

I

WRITE clock input with pull-high resistor

Data on the DATA line are latched into the device on the rising edge of the WRB signal

DATA

I/O

Signal data input/output with pull-high resistor

DS

I

Duty select pin

DS=“1”: Static, COM0 and COM1 are output the same waveform

DS=“0”: 1/2 duty

TEST

I

Test pin with pull-high resister

Remains in a floating condition in normal mode

COM0~COM1

O

LCD Common output

SEG0~SEG115

O

LCD Segment output

Absolute Maximum Ratings

StorageTemperature.......................... -55°Cto150°C

OperatingTemperature........................ -40°Cto85°C

Note:Thesearestressratingsonly.Stressesexceedingtherangespecifiedunder“AbsoluteMaximumRatings”

maycausesubstantialdamagetothedevice.Functionaloperationofthisdeviceatotherconditionsbeyond

thoselistedinthespecificationisnotimpliedandprolongedexposuretoextremeconditionsmayaffect

devicereliability.