S1D1 Epson Electronics America, Inc., S1D1 Datasheet - Page 532

• Manufacturer Part Number: S1D1
• Description: LCD Controller-driver With Built-in Character ROM
• Manufacturer: Epson Electronics America, Inc.

S1D15A06 Series
(10) Display data write
This command writes 8-bit data to the specified DDRAM address. Since the column address is automatically
incremented by +1 after each write ,the MPU can continuously write multiple-word data. See the function explanation
in “DDRAM and page/column address circuit”, for detail.
(11) Read modify write
This command is used paired with End command. Once this command is issued, the column address is not incremented
by Display data read command, but is incremented by Display data write command. This mode is maintained until End
command is issued. When End command is issued, the column address returns to the address it was at when Read modify
write command was issued. This function makes it possible to reduce the MPU load when there are the data to change
repeatedly in a specified display region, such as blinking cursor.
*When End command is issued, only column address returns to the address it was at when Read modify write command
*Even if Read modify write mode, other commands besides Display data read/write can also be used. However, Column
12–28
was issued, but page address does not return. Consequently, Read modify Write mode cannot be used over pages.
When you want to maintain the current page address after a read modify write operation done on a column address
between the start and the final column address (65H), you must specify the page address again after the operation is
over.
address set command cannot be used.
A0
A0
1
0
RD WR
RD WR
E
E
1
1
R/W
R/W
0
0
D7
D7
1
D6
D6
1
D5
D5
1
The sequence for cursor display
Write Data
D4
D4
0
No
Column address set
Read modify Write
Page address set
D3
D3
0
Figure 13
EPSON
Dummy read
Completed?
Data read
Data write
End
D2
D2
0
Yes
D1
D1
0
D0
D0
0
Rev. 1.0a