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MIC10941/10939 Micrel
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MIC10941/10939
V. F. Alphanumeric and Bargraph Display Controller
Summary Information*—Not Recommended for New Designs
General Description
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.
Micrel has received the rights from Rockwell International to
manufacture and market this product and reproduce the
specifications, including references to Rockwell.
Block Diagram
Features
• 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
Part Number Temperature Range Package
MIC10941P-50 0°C to +70°C 24-pin P-DIP
MIC10941PE-50 –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
MIC10939PE-50 –40°C to +85°C 40-pin P-DIP
20-CHARACTER 16-SEGMENT ALPHANUMERIC OR BARGRAPH DISPLAY
PNTTAIL
SEGMENT DRIVERS AND LATCHES
INVERSION
LOGIC
128 × 18 PLA
8-BIT SHIFT
REGISTER
MIC10941 MIC10939
SG01-SG16
LEVEL
DETECT
LOGIC
LEVEL
DETECT
LOGIC
SCLK-DIS
DATA-LOAD
CURSOR STR00–STR19
GRID DRIVERS
CONTROL
LOGIC
HOST
20 × 8
RAM
* Contact Micrel for more information.
8-24 August 1998
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