Specifications

EPSON 3–15

SED1210

Loading CGRAM

The character generator RAM is loaded with a character

bit pattern using a combination of one SET CGRAM

ADDRESS command and eight SET CGRAM DATA

commands. For example, to load the character shown in

figure 2 into the area of CGRAM corresponding to

character code 01H, the sequence shown below would be

used.

D4 D3 D2 D1 D0

Row 1

Row 2

Row 3

Row 4

Row 5

Row 6

Row 7

Row 8

Figure 2. User Defined Characters

Notes: 1. These steps do not include any BUSY

FLAG CHECK commands.

2. Row 8 may be used by the underline

cursor.

Step A0 WR Data Action

1 0 0 21H Set address of CGRAM 01

2 0 0 40H Data for Row 1

3 0 0 41H Data for Row 2

4 0 0 45H Data for Row 3

5 0 0 49H Data for Row 4

6 0 0 5FH Data for Row 5

7 0 0 48H Data for Row 6

8 0 0 44H Data for Row 7

9 0 0 40H Data for Row 8