lc75712e Sanyo Semiconductor Corporation, lc75712e Datasheet - Page 15

• Manufacturer Part Number: lc75712e
• Description: Dot Matrix Vfd Display Controller/driver
• Manufacturer: Sanyo Semiconductor Corporation

Usage Notes
1. Power supply sequence
2. Anode output pins
The sequences shown below must be followed when turning the power supply on and off. (See Figure 1.)
Power on: Logic block power supply (V
execution of a display on/off control instruction)
Power off: Display off (by the execution of a display on/off control instruction)
off
The anode output pins AM1 to AM35 are used as the anode outputs that form the 5 7 dot matrix due to output
current considerations. We recommend using the anode output pins AA1 to AA8 for other anode output functions.
If the anode waveform is distorted and the VFD glows slightly (smearing) due to the VFD panel used or wiring
considerations, try using a lower oscillator frequency. Refer to Figure 2 when determining the oscillator frequency.
Logic block power supply (V
DD
Fig. 1 Power Supply Sequence
) off
LC75710NE, 75711NE, 75712E
DD
Fig. 2 Oscillator Frequency
) on
Driver block power supply (V
FL
Driver block power supply (V
) on
Display on (by the
No. 4907-15/21
FL
)