MC2204
FUNCTIONAL DESCRIPTION
COMMANDS
The MC2204 has 4 kind of commands. The first command is display setting commands, the second
command is data setting command. The third command is address setting command and the fourth
command is display control command.
COMMAND 1 : DISPLAY MODE SETTING COMMAND
The Display mode setting command has 2bit (b1,b0) for display mode setting and 2bit (b7,b6)
for commands. And 2bits(b5 ~ b4) should be fixed ’00’ at any case.. The 2bits (b3 ~ b2) are don’t care bit.
The command bits (b7,b6) are “0”,”0” for COMMAND1.
The display mode setting command determines the number of segments and grids. This command
should be executed for display off. And the default of b1,b0 are “1”,”1” for power on. This status is
selected 7 grids, 10 segments and key scan enable. If b1,b0 are “1”,”0” then 6 grids 11 segments
and key scan enable selected. If b1,b0 are “0”,”1” then 5 grid 12 segments and key scan enable selected.
If b1, b0 are “0”,”0” then 4 grids 13 segments and key scan enable selected.
MSB
b7 b6
0
LSB
0 b3 b2 b1 b0
Don’t Care
Display Mode Settings :
00 : 4Grid, 13 Segments
01 : 5Grid, 12 Segments
10 : 6 Grids, 11 Segments
11 : 7 Grids, 10 Segments
should be fixed ’00’ at any case
00 : COMMAND 1
January 07, 2010 Ver 1.20
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