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HT16515 Datasheet

  • HT16515

  • 1/4 to 1/12 Duty VFD Controller

  • 138.27KB

  • 12頁

  • HOLTEK

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HT16515
1/4 to 1/12 Duty VFD Controller
Features
Logic voltage: 5V
High-voltage output: V
DD
-35V max.
Multiple display
4 LED output ports (20mA max.)
No external resistors necessary for driver output
(16-segment & 12-digit to 24-segment & 4-digit)
16麓2 matrix key scanning
8 steps dimmer circuit
(provides PMOS open-drain and pull-low resistor
output)
Serial interface with MCU (CLK, CS, DI, DO)
44-pin QFP package
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
C o m m a n d D e c o d e r
S e r ia l I/F
S e g 1 /K S 1
S e g 1 6 /K S 1 6
D I
D O
C L K
C S
D is p la y R A M
2 4 - B it
1 2 W o r d s
2 4 - B it
O u tp u t L a tc h
2 4
8
1 6
S e g m e n t
D r iv e r
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 M e m o ry
(2
1 6 )
D a ta
S e le c to r
8
1 2
4
D im m in g C ir c u it
8
M u ltip le x e d
D r iv e r
S e g 1 7 /G r id 1 2
S e g 2 4 /G r id 5
1 2 - B it
S h ift R e g is te r
K e y 0 ~ K e y 1
4 - B it L a tc h
G r id
D r iv e r
G r id 1
G r id 4
L E D 0 ~ L E D 3
V D D
V S S
V E E
Rev. 1.00
1
December 19, 2003

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