Specifications
EPSON 8–47
SED1240 Series
SED1240
Series
Character Generator RAM (CGRAM)
The SED1240 series is provided with a CGROM that permits the user to program character patterns so as to attain a
character display with a high degree of freedom. When using the CGRAM, select Use of CGRAM by the system set
command. The CGRAM capacity is 240 bits having a structure of 5 × 8 dots and optional 6 types of patterns can be
registered.
The relation among CGRAM character patterns, CGRAM addresses, and character codes is shown below.
CGRAM data (character pattern)
D7 D0 SEG
Character display
RAM Address
(CGRAM selection: RE = 1)
Character
code
0
1
(00H to 07H)
(10H to 17H)
(20H to 27H)
00H
02H
04H
(08H to 0FH)
(18H to 1FH)
(28H to 2FH)
01H
03H
05H
2
3
4
5
7
8
9
A
B
C
D
F
0***
***
***
***
***
***
***
***
***
***
***
***
***
***
***
***
1
1
0
0
0
0
0
0
0
0
0
1
0
1
0
0
1
0
0
0
0
0
1
1
1
1
0
1
0
0
1
0
0
0
1
1
1
1
1
1
0
1
0
0
1
0
0
0
0
0
1
1
1
1
0
1
0
0
1
1
1
611110
0
0
0
0
0
0
E11111
1
0
Unused Character data
1: Display
0: No display
The character size of 5 × 8 can also be set. In this case, use the RAM of *7H, *FH of the CGRAM address. However,
when the under-bar cursor is used, the data of *7H, *FH is displayed in reverse form.