Specifications

EPSON 10–9
SED1280
SED1280
If the host does not check ST1, it should determine when
to send new data by calculating the processing time of
each data block as shown in the following figure.
5 ms
After resetting
Register address toDB7 DB0
0
0
0
00 11
00 11
00 11
XX XX
XX XX
XX XX
00011
000000001
000000010
0 0 0 0 0 1 1/D S0
NFXX
System set
System set
System set
System set
Display clear
Initialization complete
Entry mode set
Display ON/OFF
5 ms
5 ms
5 ms
5 ms
Key switch and input data
The SED1280 scans the key inputs and expanded input
ports once every 5 ms. The scanned data is then output
on SOD as shown in the following figure. The status bit
is updated each time data is transmitted.
5 ms
SWS1
SWS2
SWS3
SWS8
Read timing
Read data
SOD
Data Data Data Data
Data Data Data Data