1.0 GENERAL DESCRIPTION This series of graphical 140 x 32 dot matrix Vacuum Fluorescent Display (VFD) modules are capable of displaying both graphics and text. The modules contain the VFD driver circuitry, microcontroller with built-in font tables, DC-DC converter, and serial and/or parallel interfaces. 1.1 INTERFACE OPTIONS NAGP1250AB/BB-0: parallel and/or RS-232 level asynchronous serial communication NAGP1250AB/BB-2: parallel and/or synchronous or asynchronous CMOS level serial communication NAGP1250AB/BB-3: synchronous or asynchronous CMOS level serial communication 1.2 FEATURES 5VDC operation -40C to +85C operation 2 1000 cd/m luminance and wide viewing angles Display both graphics and text simultaneously Fixed and proportional fonts for smoother character spacing 14 international font sets 8 levels of luminance control from 12.5% to 100% Screen saver modes to reduce power consumption and to reduce image burn-in 4 User Windows in addition to the Base Window for quicker image updates Variable speed scrolling Choice of serial and/or parallel interfaces (input buffer shared when using 2 interfaces at once) 1.2.1 NEW FEATURES ADDED Increased size of Extended Memory from 116 to 140 columns allowing page swapping Increased number of user defined characters from 16 to 224 allowing an entire font table to be defined Increased user defined characters size from 5x7 to 5x8 allowing descenders (g, j, p, q, y) Added 3X and 4X vertical font magnification allowing up to 4X x 4X characters Added a 255 byte input buffer for increased communication speeds 2.0 APPLICABLE DOCUMENTS Futaba Vacuum Fluorescent Display Specification GP1250AI Futaba America Engineering Standard FAES 801, Printed Circuit Board Markings PART NUMBER: REVISION: NAGP1250AB-x/BB-x B.1 DATE PRINTED: SHEET: Futaba Corporation of America 17Oct12 1 OF 45 Schaumburg, IL 3.0 GENERAL SPECIFICATIONS Item Value Unit Number of dots 140 columns x 32 rows - Dot height 0.57 mm Dot width 0.4 mm Dot pitch vertical 0.67 mm Dot pitch horizontal 0.5 mm Pattern width 69.9 mm Pattern height 21.34 mm Peak wavelength of illumination x = 0.24, y = 0.41 (green) - 2 Luminance 500 (min.) 1000 (typ.) Cd/m 4.0 SYSTEM BLOCK DIAGRAM D0-D7* /WR PARALLEL INTERFACE /RD VFD CIG PBUSY MICROCONTROLLER GP1250AI SIN SBUSY SERIAL /RESET INTERFACE SCK V (5VDC) CC * ONLY D7 IS BIDIRECTIONAL DC-DC/AC CONVERTER GND PART NUMBER: REVISION: NAGP1250AB-x/BB-x B.1 DATE PRINTED: SHEET: Futaba Corporation of America 17Oct12 2 OF 45 Schaumburg, IL