Specifications

7–26 EPSON
SED1234/35 Series
Symbol Register
The SED1234, 1235 provided with a symbol register that permits displaying each symbol so that symbol display may be
performed on the screen.
The capacity of the symbol register is 48 bits. In case of 48 symbols can be displayed.
The relationship among symbol register display patterns, RAM addresses and write data is shown below.
*
12
23 2412
SEG4SEG2SEGS2
COMS2
COMS3
SEGS6SEG57SEG59
25 26 47 48
1
RAM address
Symbol Bits
70H~7BH
D7 D0
0
1
B
25
27
47
1
3
23
26
28
48
2
4
24
·· ··
*** *
*** *
***
Bit
1: Display
0: Not display
Notes: 1. We recommend to drive a symbol by dividing it into COMS2 and COMS3 separately if it is larger than
other dots for 1.5 times or more.
2. Do not cross a segment (other than those used for symbol display) with COMS2 or COMS3. If segment
crossing is required, set the symbol registers of COMS3 to all zeros (0s).