ssd1325z Bolymin, Inc, ssd1325z Datasheet - Page 36

• Manufacturer Part Number: ssd1325z
• Description: 128 X 80, 16 Gray Scale Dot Matrix Oled/pled Segment/common Driver With Controller
• Manufacturer: Bolymin, Inc

10 COMMAND DESCRIPTIONS
10.1 Fundamental command description
10.1.1 Set Column Address (15h)
This triple byte command specifies column start address and end address of the display data RAM. This
command also sets the column address pointer to column start address. This pointer is used to define the
current read/write column address in graphic display data RAM. If horizontal address increment mode is
enabled by command A0h, after finishing read/write one column data, it is incremented automatically to
the next column address. Whenever the column address pointer finishes accessing the end column
address, it is reset back to start column address and the row address is incremented to the next row.
10.1.2 Set Row Address (75h)
This triple byte command specifies row start address and end address of the display data RAM. This
command also sets the row address pointer to row start address. This pointer is used to define the current
read/write row address in graphic display data RAM. If vertical address increment mode is enabled by
command A0h, after finishing read/write one row data, it is incremented automatically to the next row
address. Whenever the row address pointer finishes accessing the end row address, it is reset back to start
row address.
The diagram below shows the way of column and row address pointer movement through the example:
column start address is set to 2 and column end address is set to 61, row start address is set to 1 and row
end address is set to 78; horizontal address increment mode is enabled by command A0h. In this case, the
graphic display data RAM column accessible range is from column 2 to column 61 and from row 1 to row
78 only. In addition, the column address pointer is set to 2 and row address pointer is set to 1. After
finishing read/write one pixel of data, the column address is increased automatically by 1 to access the
next RAM location for next read/write operation (solid line in Figure 18). Whenever the column address
pointer finishes accessing the end column 61, it is reset back to column 2 and row address is automatically
increased by 1 (solid line in Figure 18). While the end row 78 and end column 61 RAM location is
accessed, the row address is reset back to 1 and the column address is reset back to 2 (dotted line in Figure
18).
Solomon Systech
Row 77
Row 78
Row 79
Row 0
Row 1
Row 2
:
:
:
0
Figure 18 : Example of Column and Row Address Pointer Movement
1
2
…..
:
:
:
…….
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Column address
SEG outputs
Rev 1.9
SSD1325