ST7522 Sitronix, ST7522 Datasheet - Page 24

• Manufacturer Part Number: ST7522
• Description: 17 x 96 Dot Matrix LCD Controller
• Manufacturer: Sitronix

ST7522
This command defeats column address register auto-increment after data reads. The current contents of the column
Address register are saved. The mode remains active until an End command is received.
When the End command is entered, the column address is returned to the one used during input of Read-Modify-Write
Command. This function can reduce the load of MPU when data change is repeated as a specific display area.
*Any command other than Data Read or Write can be used in the Read-Modify-Write mode. However, the Column
Address Set command cannot be used.
This command cancels read-modify-write mode and restores the contents of the column address register to their value prior
to the receipt of the Read-Modify-Write command.
Ver 1.0c
A0
A0
0
0
Column address
Read-Modify-Write
End
―
―
RD
RD
1
1
WR
WR
―
―
0
0
D7
D7
1
1
N
D6
D6
1
1
Read -modify-write mode set
N+1
D5
D5
1
1
N+2
Read-modify-write
No
24/45
D4
D4
Set column address
0
0
Set page address
N+3
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Dummy read
Completed?
Read data
Write data
End
D3
D3
0
1
Yes
D2
D2
0
1
N+m
D1
D1
0
1
N
Returm
D0
D0
0
0
2002/07/10
End
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