Specifications

EPSON 9–17
SED1278
SED1278
Software initialization
Initialization during power-on reset involves several
unstable factors related to power-supply output
fluctuations. For this reason it is strongly recommended
that a software initialization sequence is followed.
• Software Initialization (8-bit MPU bus, f
OSC = 250 kHz)
[1]
000011****
****
****
**
DB7 RS R/W E
······ DB0
30 ms or more
4.1 ms or more
100 µs or more
40 µs or more
System set
System set
[2]
[3]
[4]
[5]
[7]
000011
DB7 RS R/W E
······ DB0
000011
DB7 RS R/W E
······ DB0
System set
[6]
000011NF
DB7 RS R/W E ······ DB0
BF=0
BF 0 1 1
DB7 RS R/W E ······ DB0
Busy flag
BF=0
BF=1
BF=1
BF 0 1 1
DB7 RS R/W E
······ DB0
Busy flag
Power-on
System set
A CC
A CC