HT16515_10 Datasheet, PDF (1/13 Pages) Holtek Semiconductor Inc – 1/4 to 1/12 Duty VFD Controller

HT16515
1/4 to 1/12 Duty VFD Controller
Features
· Logic voltage: 3.0V~5.5V
· High-voltage output: V_DD-35V max.
· Multiple display
(16-segment & 12-digit to 24-segment & 4-digit)
· 16´2 matrix key scanning
· 8 steps dimmer circuit
· 4 LED output ports
· 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 QFP/LQFP packages
Applications
· Consumer products panel function control
· Industrial measuring instrument panel function control
· Other similar applications for panel function control
General Description
HT16515 is a VFD (Vacuum Fluorescent Display) con-
troller/driver that is driven on a 1/4 to 1/12 duty factor. It
consists of 16 segment output lines, 4 grid output lines,
8 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 HT16515 through a three-line
serial interface. This VFD controller/driver is an ideal
MCU peripheral device.
Block Diagram
DI
DO
S e r ia l I/F
C LK
CS
O SC
O SC
K ey0~K ey1
C om m and D ecoder
D is p la y R A M
2 4 - B it ´ 1 2 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 M e m o ry
(2 ´ 1 6 )
4 - B it L a tc h
2 4 - B it
24
16
O u tp u t L a tc h
8
D a ta ⁸
S e le c to r
S egm ent
D r iv e r
M u ltip le x e d
D r iv e r
8
1 2 - B it
S h ift R e g is te r
12
4
D im m in g C ir c u it
G r id
D r iv e r
S e g 1 /K S 1
S e g 1 6 /K S 1 6
S e g 1 7 /G r id 1 2
S e g 2 4 /G r id 5
G r id 1
G r id 4
LE D 0~LE D 3
VDD VSS VEE
Rev. 1.70
1
May 7, 2010