HT1632 Datasheet, PDF (1/17 Pages) Holtek Semiconductor Inc – 32x8 & 24x16 LED Driver

HT1632
32´8 & 24´16 LED Driver
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
Applications
· Industrial control indicator
· Digital clock, thermometer, counter, voltmeter
· Instrumentation readouts
· Other consumer application
· LED Displays
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.
Block Diagram
VDD
VSS
D is p la y R A M
CS
RD
WR
D ATA
O SC
SYNC
C o n tro l
and
T im in g
C ir c u it
T im in g
G e n e ra to r
L E D D r iv e r
P W M C o n tro l
COM 0
COM 7
O U T B IT 0
O U T B IT 2 3
O U T B IT 2 4 /C O M 1 5
O U T B IT 3 1 /C O M 8
LE D _V S S
Rev. 1.00
1
October 2, 2007