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Interface Signals

The interface of all CIG VFDs is "C-MOS" synchronous serial data. The adjacent table lists the functions of the interface signals. The input voltage levels are 2.4V minimum for High and 0.7V maximum for Low with respect to Vss (0V) when VDD1 is 5V.

 

Signal Function *only where applicable Description
CLK Shift Register Clock Serial Data Read and
Shift at Rising Edge
GCLK Shift Register Clock for the Grid Driver *
SI Serial Data Input H=ON
L=OFF
GSI Serial Data Input for the Grid Driver *
SO, GSO Serial Data Output Used for watchdog and verify.
LAT Data Latch Control H=Transparent
L=Latched
GLAT Data Latch Control for the Grid Driver *
BK Driver Output Blanking Control H=Output OFF
L=Output ON
GBK Grid Driver Output Blanking Control *

Chip in Glass VFD (BD-VFD)

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