MIC10938/10939 Micrel MIC10938/10939 V. F. Dot Matrix Display Controller Summary Information*—Not Recommended for New Designs General Description Features The MIC10938 and MIC10939 Dot Matrix Display Controller is a two-chip MOS/LSI general purpose display controller system designed to interface to dot matrix displays (vacuum fluorescent or LED). The two-chip set will drive displays with up to 35 anodes (dots) and up to 20 grids (characters) plus a cursor. The chips can be cascaded to drive larger displays of as many as 80 characters. An internal PLA-type decoder provides character decoding and dot pattern generation for the full 96-character ASCII set and an additional 32 special characters. • • • • • 20-character display driver cascadable to 80 characters Standard 5 × 7 character font Separate cursor driver output Direct drive capability for vacuum-fluorescent displays 128 × 35 PLA provides segment decoding for full 96character ASCII set, plus 32 special characters • Serial or parallel data input for 8-bit display and control characters • 40-pin DIP or 44-pin PLCC Ordering Information Micrel has received the rights from Rockwell International to manufacture and market this product and reproduce the specifications, including references to Rockwell. Part Number Temperature Range Package MIC10938J-50 0°C to +70°C 44-pin PLCC MIC10938P-50 0°C to +70°C 40-pin P-DIP MIC10938PE-50 –40°C to +85°C 40-pin P-DIP MIC10939J-50 0°C to +70°C 44-pin PLCC MIC10939P-50 0°C to +70°C 40-pin P-DIP –40°C to +85°C 40-pin P-DIP MIC10939PE-50 ‡ Dual-marked devices replace both 40V and 50V versions Block Diagram 20-CHARACTER 5 × 7 DOT MATRIX DISPLAY SG01-SG35 CURSOR ANODE DRIVERS AND LATCHES STR00–STR19 GRID DRIVERS INVERSION LOGIC LEVEL DETECT LOGIC DATA-LOAD 128 × 35 PLA 8-BIT SHIFT REGISTER CONTROL LOGIC LEVEL DETECT LOGIC 20 × 8 RAM SCLK-DIS MIC10938 MIC10939 HOST * Contact Micrel for more information. 8-22 August 1998