FEDL9222-02
¡ Semiconductor
FEDL9222-02
This version: Feb. 2000
ML9222
Previous version: Nov. 1999
¡ Semiconductor
ML9222
GENERAL DESCRIPTION
32-Bit Duplex/Triplex VFD Controller/Driver with Digital Dimming, ADC and Keyscan
The ML9222 is a full CMOS controller/driver for Duplex or Triplex vacuum fluorescent display
tube. It conststs of 32-segment driver outputs and 3-grid pre-driver outputs, so that it can drive
directly up to 96-segment VFD.
ML9222 features a digital dimming function, a 8-ch ADC, a 5
¥
5 keyscan circuit and an encoder
type switch interface.
ML9222 provides an interface with a microcontroller only by four signal lines: DATA I/O,
CLOCK, CS and INT.
FEATURES
• Supply voltage (V
DD
)
• Duplex/Triplex selectable
• Applicable VFD tube
: 8 to 18.5V (Built-in 5V regulator for logic)
: 2 Grids
¥
32 Anodes VFD tube
: 3 Grids
¥
32 Anodes VFD tube
• 32-segment driver outputs
: I
OH
=–5mA at V
OH
=V
DD
–0.8V (SEG1 to 22)
I
OH
=–10mA at V
OH
=V
DD
–0.8V (SEG23 to 32)
• 3-grid pre-driver outputs
: I
OL
=10mA at V
OL
=2V
• Built-in digital dimming circuit (10-bit resolution)
• Built-in 8-ch A/D converter
• Built-in 5
¥
5 keyscan circuit
• 3 interface circuits for an encoder type rotary switch
• Built-in oscillation circuit (external R and C)
• Built-in Power-On-Reset circuit
• Package:
80-pin plastic QFP (QFP80-P-1420-0.80-BK)
Product name: ML9222GA
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