Specifications

8–48 EPSON
SED1240 Series
Symbol Register RAM
The SED1240 series is provided with a symbol register RAM that permits setting each symbol so that symbols may be
displayed individually on the screen.
The symbol register capacity is 160 bits in both SED1240, SED1241 and SED1242 series and up to 160 symbols can be
displayed.
Each symbol can be blink-controlled in units of bit by using D7 and D6.
The relation among symbol register display patterns, RAM address and write data is shown by citing an example.
[SED1240 (4-line 16-digit display), SED1241 (2-line 16-digit display)]
15
71
75
75
12345
2345
SEG1
COMS1
COMS2
SEG71
61 65 151 155
1
RAM address [RE = 1]
Bits for symbol
60H to 6FH
D7 D0
0
1
F
1*IORHBONF
*IORHBONF
*IORHBONF
*IORHBONF
*IORHBONF
*IORHBONF
6
76
2
7
77
3
8
78
45
910
79 80
70H to 7FH
0
1
F
81
86
156
82
87
157
83 85
88 90
158 160
84
89
159
16
76
80
80
SEG76
156 160
• •• • • •• •