MIC10941/10939 Micrel MIC10941/10939 V. F. Alphanumeric and Bargraph Display Controller Summary Information*—Not Recommended for New Designs General Description Features The MIC10941 and MIC10939 Alphanumeric and Bargraph Display Controller is a two-chip MOS/LSI general purpose display controller system designed to interface with bargraph and segmented displays (vacuum fluorescent or LED). The two-chip set will drive displays with up to 16 segments (plus decimal point and comma tail) and up to 20 grids (characters) plus a cursor. The chips can be cascaded to drive larger displays of 80 characters. Segment decoding for ASCII characters and bargraph patterns is accomplished through an internal PLA. • 20-character display driver cascadable to 80 characters • Direct drive capability for vacuum-fluorescent displays • 128 × 18 PLA provides segment decoding for ASCII characters (all caps only) and bargraph patterns • Serial or parallel data input for 8-bit display and control characters • Brightness, refresh rate, and display mode controls • Separate cursor driver output • 40-pin DIP or 44-pin PLCC (MIC10939) • 24-pin DIP package (MIC10941) 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 MIC10941P-50 Package 0°C to +70°C 24-pin P-DIP –40°C to +85°C 24-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 MIC10941PE-50 MIC10939PE-50 Block Diagram 20-CHARACTER 16-SEGMENT ALPHANUMERIC OR BARGRAPH DISPLAY TAIL PNT SG01-SG16 CURSOR SEGMENT DRIVERS AND LATCHES STR00–STR19 GRID DRIVERS INVERSION LOGIC LEVEL DETECT LOGIC SCLK-DIS 128 × 18 PLA 8-BIT SHIFT REGISTER CONTROL LOGIC LEVEL DETECT LOGIC 20 × 8 RAM DATA-LOAD MIC10941 MIC10939 HOST * Contact Micrel for more information. 8-24 August 1998