ST7577 Sitronix Technology, ST7577 Datasheet - Page 26

• Manufacturer Part Number: ST7577
• Description: Dot Matrix LCD Controller/Driver
• Manufacturer: Sitronix Technology

ST7577
H=0
When Function Set instruction sets H=0, the selected instruction descriptions are as below.
End Read-Modify-Write
This command releases the Read-Modify-Write mode, and returns the column and row address to the address it was at
when the mode was entered.
Enable Read-Modify-Write
This command is used paired with the ”End Read-Modify-Write” instruction. Once this command has been input, the display
data read command does not change the column and row address, but only the display data write command increments (+1)
the address depend on V register setting. This mode is maintained until the END command is input. When the END
command is input, the address returns to the address it was at when the read/modify/write command was entered. This
function makes it possible to reduce the load on the MPU when there are repeating data changes in a specified display
region, such as when there is a blanking cursor.
* Even in read/modify/write mode, other commands aside from display data read/write commands can also be used.
Display Control
The bits D and E configure the display mode.
Ver 1.0a
Flag
D, E
A0
A0
A0
0
0
0
R/W(/WR)
R/W(/WR)
R/W(/WR)
D
0
0
1
1
0
0
0
E
0
1
0
1
D7
D7
D7
0
0
0
Display Blank (DDRAM Data is masked out, segments
will always output non-selected waveform)
All Segments ON
Normal mode
Inverse Display mode
D6
D6
D6
0
0
0
Data Write (at same Address)
Read-Modify-Write Cycle
Column Address Set
Read-Modify-Write
Page Address Set
Display Mode
Dummy Read
Modify Data
Data Read
Finished?
D5
D5
D5
0
0
0
Done
26/48
Yes
Description
D4
D4
D4
0
0
0
No
D3
D3
D3
0
0
1
D2
D2
D2
D
1
1
D1
D1
D1
www.DataSheet4U.com
1
1
0
2008/02/14
D0
D0
D0
E
0
1