August 1998
8-23
MIC10939/10942/10943
Micrel
8
MIC10939/10942/10943
V. F. Dot Matrix Display Controller
Summary Information*--Not Recommended for New Designs
Ordering Information
Part Number
Temperature Range
Package
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
MIC10942P-50
0
C to +70
C
40-pin P-DIP
MIC10942PE-50
40
C to +85
C
40-pin P-DIP
MIC10943P-50
0
C to +70
C
40-pin P-DIP
MIC10943PE-50
40
C to +85
C
40-pin P-DIP
General Description
The MIC10939, MIC10942, and MIC10943 Dot Matrix Dis-
play Controller is a three-chip MOS/LSI general purpose
display controller system designed to interface to dot matrix
displays (vacuum fluorescent or LED).
The three-chip set will drive displays with up to 46 anodes
(dots) and up to 20 grids (characters) plus a cursor. The chips
can be cascaded to drive larger displays of up to 80 charac-
ters.
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.
Micrel has received the rights from Rockwell International to
manufacture and market this product and reproduce the
specifications, including references to Rockwell.
Block Diagram
INVERSION
LOGIC
8-BIT SHIFT
REGISTER
ANODE DRIVERS AND LATCHES
128
35 PLA
LEVEL
DETECT
CONTROL
LOGIC
GRID
DRIVERS
20-CHARACTER 5
12 DOT MATRIX DISPLAY
MIC10942
MIC10939
SG01-SG23
STR00STR19
DATA-
LOAD
SCLK
-DIS
INVERSION
LOGIC
8-BIT SHIFT
REGISTER
ANODE DRIVERS AND LATCHES
128
23 PLA
LEVEL
DETECT
MIC10943
SG01-SG23
LEVEL
DETECT
LEVEL
DETECT
23
23
20
8
RAM
20
CURSOR
HOST
* Contact Micrel for more information.
Features
20-character display driver cascadable to 80 characters
Standard 5
12 character font
Separate cursor driver output
Two 128
23 PLAs provides segment decoding for full
96-character ASCII set, plus 32 special characters
Serial or parallel data input for 8-bit display mode
controls
Brightness, refresh rate, and display mode controls
40-pin DIP or 44-pin PLCC (MIC10939)
28-pin DIP (MIC10942 and MIC10943)
PDF 
ZIP