Specifications

EPSON 7–25
SED1234/35 Series
SED1234/35
Series
Character Generator RAM (CG RAM)
The SED1230 Series is provided with a CG RAM that permits user-programming character patterns so that they can be
displayed with a high degree of freedom for signal display.
Before using the CG RAM, select the use of CG RAM by the System Set command.
The capacity of the CG RAM is 140 bits and arbitrary patterns of 4 types consisting of 5 × 7 dots can be registered.
The relationship among CG RAM patterns, CG RAM addresses, and character codes is shown below.
CGRAM data (character pattern)
D7 D0
Display
RAM addressCharacter code
0
1
00H~06H
10H~16H
00H
02H
08H~0EH
18H~1EH
01H
03H
2
3
4
5
6
8
9
A
B
C
D
E
***
***
***
***
***
***
***
***
***
***
***
***
***
***
0
1
1
0
0
0
1
0
0
0
0
0
1
1
1
0
0
1
0
0
1
0
0
1
1
1
1
1
1
0
0
1
0
0
1
1
1
1
1
1
1
1
1
0
0
1
0
0
1
0
0
1
1
1
1
1
1
0
0
1
1
1
0
0
0
0
0
0
1
1
Unused Character data
1: Display
0: Non-display