7. COMMAND
S1D15722D01B000 Technical Manual (Rev.1.1)
EPSON
37
(18) Read-modify-write
This command is used with the end command in a pair. Once this command is input, the column address
will not be changed with the read display data command but incremented by +1 only with the write display data.
This state is held until the end command is input.
Inputting the end command returns the column address to the address at the time of inputting the
read-modify-write command. This function lessens the load from MPU when repeatedly changing data in the
specific display area like blinking cursor.
E R/
__
W
A0
___
RD
___
WR D7 D6 D5 D4 D3 D2 D1 D0
0 1 0 1 1 1 0 0 0 0 0
The command other than read/write display command can be used even in the read-modify-write mode.
The page address set command and column address set command.
Sequence of cursor display
Fig.7.3 Sequence of Cursor Display
No
Yes
Data processing
End change?
End
Dummy read
Set page address
Set column address
Read-modify-write
Data write
Data read
