HT1632 datasheet(1/17 Pages) HOLTEK

Part #	HT1632

Description	32x8 & 24x16 LED Driver

PDF	17 Pages

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Manufacturer	HOLTEK [Holtek Semiconductor Inc]

Direct Link	http://www.holtek.com

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HT1632

32´8&24´16 LED Driver

Block Diagram

Rev. 1.00

1

October 2, 2007

General Description

The HT1632 is a memory mapping LED display control-

ler/driver, which can select a number of out bits and com-

mons. These are 32 out bits & 8 commons and 24 out bits

& 16 commons. The device supports 16-gradation LEDs

for each out line using PWM control with software instruc-

tions. A serial interface is conveniently provided for the

command mode and data mode. Only three or four lines

are required for the interface between the host controller

and the HT1632. The display can be extended by cas-

cading the HT1632 for wider applications.

Features

· Operating voltage: 2.4V~5.5V

· Multiple LED display - 32 out bits/8 commons and

24 out bits/16 commons

· Integrated display RAM - select 32 out bits &

8 commons for 64

´4 display RAM, or select 24

outbits & 16 commons for 96

´4 display RAM

· 16-level PWM brightness control

· Integrated 256kHz RC oscillator

· Serial MCU interface - CS,RD,WR, DATA

· Data mode & command mode instruction

· Cascading function for extended applications

(up to 5 HT1632s possible)

· Selectable NMOS open drain output driver and

PMOS open drain output driver for commons

· 52-pin QFP package

P W M C o n t r o l

D i s p l a y R A M

L E D D r i v e r

C o n t r o l

a n d

T i m i n g

C i r c u i t

V D D

D A T A

W R

C S

R D

T i m i n g

G e n e r a t o r

O S C

C O M 0

C O M 7

O U T B I T 0

O U T B I T 2 3

O U T B I T 2 4 / C O M 1 5

O U T B I T 3 1 / C O M 8

L E D _ V S S

V S S

S Y N C

Applications

· Industrial control indicator

· Digital clock, thermometer, counter, voltmeter

· Instrumentation readouts

· Other consumer application

· LED Displays

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