HT1632C Datasheet, PDF (1/24 Pages) Holtek Semiconductor Inc – 32x8 & 24x16 LED Driver

HT1632C
32´8 & 24´16 LED Driver
Features
· Operating voltage: 2.4V~5.5V
· Multiple LED display - 32 ROW /8 COM and
24 ROW & 16 COM
· Integrated display RAM - select 32 ROW &
8 COM for 64´4 display RAM, or select
24 ROW & 16 COM 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
· 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 HT1632C is a memory mapping LED display control-
ler/driver, which can select a number of ROW and com-
mons. These are 32 ROW & 8 commons and 24 ROW &
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 HT1632C. The display can be extended by cas-
cading the HT1632C 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
2
LE D _V D D
COM 0
COM 7
ROW 0
R O W 23
R O W 2 4 /C O M 1 5
R O W 3 1 /C O M 8
LE D _V S S
2
P W M C o n tro l
Rev. 1.20
1
June 28, 2011