HT16512
1/4 to 1/11 Duty VFD Controller
Features
·
Logic voltage: 5V
·
High-voltage output: V
DD
-35V
max
.
·
Multiple display (11-segment & 11-digit to 16-segment
·
4-bit general purpose input port
·
No external resistors necessary for driver output
& 6-digit)
·
6´4 matrix key scanning
·
8 steps dimmer circuit
·
4 LED output ports
(provides PMOS open-drain and pull-low resistor
output)
·
Serial interface with MCU (CLK, CS, DI, DO)
·
44-pin QFP/LQFP package
Applications
·
Consumer products panel function control
·
Industrial measuring instrument panel function control
·
Other similar application panel function control
General Description
HT16512 is a VFD (Vacuum Fluorescent Display) con-
troller/driver that is driven on a 1/4 to 1/11 duty factor. It
consists of 11 segment output lines, 6 grid output lines, 5
segment/grid output drive lines, 4 LED output ports, a
control circuit, a display memory, and a key scan circuit.
Serial data inputs to the HT16512 through a three-line
serial interface. This VFD controller/driver is ideal as a
peripheral device for an MCU.
Block Diagram
D I
D O
C L K
C S
S e r ia l I/F
C o m m a n d D e c o d e r
6
D is p la y R A M
1 6 - B it
´
1 1 W o r d s
1 6 - B it
O u tp u t L a tc h
1 6
5
1 1
S e g m e n t
D r iv e r
5
S 0 /K 0 ~
S 5 /K 5
S 6 ~ S 1 0
O S C
O S C
T im in g G e n e r a to r
K e y S c a n
5
1 1 - B it
S h ift R e g is te r
1 1
D a ta
S e le c to r
5
M u ltip le x e d
D r iv e r
5
S 1 1 /G 1 0 ~
S 1 5 /G 6
K e y D a ta R A M
K 0 ~ K 3
4 - B it
L a tc h
4 - B it L a tc h
(4
´
6 )
6
G r id
D r iv e r
6
G 0 ~ G 5
S W 0 ~ S W 3
D im m in g C ir c u it
L E D 0 ~ L E D 3
V D D
V S S
V E E
Rev. 1.50
1
May 7, 2010
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
