Specifications

SED1220
EPSON 4–29
SED1220
Symbol Register
SED1220 contains the symbol register which enable individual symbol setting for displaying on the screen.
Capacity of the symbol register is 120 bits and is capable of displaying up to 120 symbols.
Following shows relationship between the symbol register display patterns, RAM addresses and written data.
15660234
··· ···
···5
SEG1SEG1 2
COMS1
COMS2
SEGS4 5SEG562345 60
61 65 116 120
13
13121
RAM address
Symbol Bits
60H~6BH
70H~7BH
D7 D0
0
1
B
0
1
B
1
6
56
61
66
116
2
7
57
62
67
117
3
8
58
63
68
118
4
9
59
64
69
119
5
10
60
65
70
120
·· ·· ··
··
***
***
***
***
***
***
Note: When the symbol is 1.5 times or more than the character, it is recommended to drive it using both COMS1
and COMS2.