SED1565 Datasheet, PDF (28/87 Pages) Epson Company – Direct display of RAM data through the display data RAM

SED1565 Series
The Busy Flag
When the busy flag is “1” it indicates that the SED1565
Series chip is running internal processes, and at this
time no command aside from a status read will be
received. The busy flag is outputted to D7 pin with the
read instruction. If the cycle time (tCYC) is maintained,
it is not necessary to check for this flag before each
command. This makes vast improvements in MPU
processing capabilities possible.
WR
DATA
BUS Holder
Write Signal
Writing
N
Latch
N
N+1
N+1
N+2
N+2
N+3
N+3
WR
RD
DATA
Address Preset
Read Signal
Column Address
Bus Holder
Reading
N
N
n
n+1
Preset N
N
Increment N+1
n
N+2
n+1
n+2
Address Set
#n
Dummy
Read
Data Read
#n
Data Read
#n+1
Figure 2
8–26
EPSON