HT16511
1/8 to 1/16 Duty VFD Controller
Features
·
Logic voltage: 5V
·
High-voltage output: V
DD
-35V max.
·
Multiple display
·
4-bit general purpose input port
·
No external resistors necessary for driver output
(12-segment & 16-digit to 20-segment & 8-digit)
·
12´4 matrix key scanning
·
8 steps dimmer circuit
·
5 LED output ports (20mA max.)
(provides PMOS open-drain and pull-low resistor
output)
·
Serial interface with MCU (CLK, CS, DI, DO)
·
52-pin QFP package
Applications
·
Consumer products panel function control
·
Industrial measuring instrument panel function control
·
Other similar application panel function control
General Description
HT16511 is a VFD (Vacuum Fluorescent Display) con-
troller/driver that is driven on a 1/8 to 1/16 duty factor. It
consists of 12 segment output lines, 8 grid output lines,
8 segment/grid output drive lines, 5 LED output ports, a
control circuit, a display memory, and a key scan circuit.
Serial data inputs to the HT16511 through a three-line
serial interface. This VFD controller/driver is ideal as a
peripheral device for an MCU.
Block Diagram
C o m m a n d D e c o d e r
S e r ia l I/F
D I
D O
C L K
C S
D is p la y R A M
2 0 - B it
´
1 6 W o r d s
2 0 - B it
O u tp u t L a tc h
2 0
8
1 2
S e g m e n t
D r iv e r
1 2
S 1 /K 1 ~
S 1 2 /K 1 2
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
K e y D a ta R A M
(4
´
1 2 )
D a ta
S e le c to r
8
1 6
8
D im m in g C ir c u it
8
M u ltip le x e d
D r iv e r
8
S 1 3 /G 1 6 ~
S 2 0 /G 6
1 6 - B it
S h ift R e g is te r
K 0 ~ K 3
S W 0 ~ S W 3
4 - B it
L a tc h
5 - B it L a tc h
G r id
D r iv e r
8
G 1 ~ G 8
L E D 0 ~ L E D 4
V D D
V S S
V E E
Rev. 1.10
1
September 18, 2003
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
