1. SCOPE
This specification applies to VFD module (128S64AA2G) manufactured by SSED (Shanghai Samsung SVA Electronic
Devices).
2. FEATURES
* The input voltage for display is a single 5VDC.
* High quality of display and luminance by the double-matrix driving system.
* Compact and light-weight unit by using flat packed display drivers and one-chip VFD controller.
* Serial and 8-bit parallel interface available.
* Flash RAM for Font reserved for ASCII GB2312 KSC5601 and Shift JIS font table.
* Luminance adjustment available by software.
3. PRECAUTIONS (OPERATING RECOMMENDATIONS)
* Avoid applying excessive shock or vibration beyond the specification for the VFD module.
* Since VFD is made of glass material, careful handling is required. i.e. Direct impact with hard material to the glass
surface(especially exhaust tip) may crack the glass.
* When mounting the VFD module to your system, leave a slight gap between the VFD glass and your front panel. The
module should be mounted without stress to avoid flexing of the PCB.
* Avoid plugging or unplugging the interface connection with the power on, otherwise it may cause the severe damage to
input circuitry.
* Exceeding any of maximum ratings may cause the permanent damage.
* Since the VFD modules contain high voltage source, careful handling is required during powered on.
* When the power is turned off, the capacitor does not discharge immediately. The high voltage applied to the VFD must
not contact to the ICs. In other words, the compulsory short-circuit of mounted components on PCB within 30 seconds
after power-off may cause damage to the module.
* Sending any input signals to the VFD module during power-off condition may cause I/O port damage in VFD circuitry.
* The power supply must be capable of providing at least 5 times the rated current, because the inrush current maybe
5 times the specified current consumption when the power is turned on.
* Avoid using the module where excessive noise interference is expected. Noise may affects the interface signal and causes
improper operation. And it is important to keep the length of the interface cable less than 15 meters (50 feet).
* Since all VFD modules contain C-MOS ICs, anti-static handling procedures are always required.