HT16512_12 Datasheet, PDF (1/11 Pages) Holtek Semiconductor Inc – 1/4 to 1/11 Duty VFD Controller

HT16512
1/4 to 1/11 Duty VFD Controller
Features
· Logic voltage: 3.0V~5.5V
· High-voltage output: V_DD-35V max.
· Multiple display (11-segment & 11-digit to 16-segment
& 6-digit)
· 6´4 matrix key scanning
· 8 steps dimmer circuit
· 4 LED output ports
· 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)
· 44-pin 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
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
1 6 - B it ´ 1 1 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 ´ 6 )
4 - B it L a tc h
1 6 - B it
16
11
O u tp u t L a tc h
5
6
S 0 /K 0 ~
S egm ent
S 5 /K 5
D r iv e r
5
S 6~S 10
D a ta ⁵ M u ltip le x e d ⁵
S e le c to r
D r iv e r
S 1 1 /G 1 0 ~
S 1 5 /G 6
5
1 1 - B it
S h ift R e g is te r
11
6
G r id
D r iv e r
6
G 0~G 5
D im m in g C ir c u it
LE D 0~LE D 3
VDD VSS VEE
Rev. 1.70
1
November 5, 2012