HT16511_13 Datasheet, PDF (1/14 Pages) Holtek Semiconductor Inc – 1/8 to 1/16 Duty VFD Controller

HT16511
1/8 to 1/16 Duty VFD Controller
Features
· Logic voltage: 3.0V~5.5V
· High-voltage output: V_DD-35V max.
· Multiple display
(12-segment & 16-digit to 20-segment & 8-digit)
· 12´4 matrix key scanning
· 8 steps dimmer circuit
· 5 LED output ports (20mA max.)
· 4-bit general purpose input port
· No external resistors necessary for driver output
(provides PMOS open-drain and pull-low resistor
output)
· Serial interface with MCU (CLK, CS, DI, DO)
· 52-pin LQFP 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
DI
DO
S e r ia l I/F
C LK
CS
O SC
O SC
K 0~K 3
S W 0~S W 3
4 - B it
L a tc h
C om m and D ecoder
D is p la y R A M
2 0 - B it ´ 1 6 W o r d s
T im in g G e n e r a to r
K ey S can
K e y D a ta R A M
(4 ´ 1 2 )
5 - B it L a tc h
2 0 - B it
20
12
O u tp u t L a tc h
8
D a ta ⁸
S e le c to r
8
1 6 - B it
S h ift R e g is te r
16
8
D im m in g C ir c u it
S egm ent ¹²
D r iv e r
M u ltip le x e d ⁸
D r iv e r
G r id
8
D r iv e r
S 1 /K 1 ~
S 1 2 /K 1 2
S 1 3 /G 1 6 ~
S 2 0 /G 6
G 1~G 8
LE D 0~LE D 4
VDD VSS VEE
Rev. 1.60
1
October 31, 2013