SSD1789A Solomon Systech, SSD1789A Datasheet - Page 38

• Manufacturer Part Number: SSD1789A
• Description: CSTN LCD Driver
• Manufacturer: Solomon Systech

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9.2
This command enters the page address from 0 to 131 to the RAM page register for read/write operations. The
driver supports up to 132 lines. All in all, there are 132 pages. As the addresses are incremented from the
start page to the end page in the page direction scan, the column address is incremented by 1. The page
address is then returned to the start page. Start page < End page must be maintained.
9.3
This command sets the scan direction of the COM output allowing layout flexibility in LCD module assembly.
Please refer to the Table 6 on Page 26 for detail mapping. In addition, the display will have immediate effect
once this command is issued. That is, if this command is sent during normal display, the graphic display will
have vertical flipping effect.
9.4
This command sets the DDRAM such that the MPU operates the display data in the internal RAM.
A. Normal or Inverse page/column/scan directions
The Data Scan direction can be set to either normal or inverse display page and column address scan direction. The
column and the page direction are illustrated in the following figure and
Figure 8 on page 39 for the example of normal or inverse page/column/ scan directions.
Figure 7 - Column and page scan direction
Solomon Systech
Set Page Address (75 Hex)
Set COM Output Scan Direction (BB Hex)
Set Data Output Scan Direction (BC Hex)
P12 = 0: Column Direction
P11=0
P11=1
P10=0
0
1
2
:
:
:
129
130
131
P12 = 1: Page Direction
P11=0
P11=1
P10=0
0
1
2
:
:
:
129
130
131
P10=1
131
130
129
:
:
:
2
1
0
P10=1
131
130
129
:
:
:
2
1
0
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0
131
0
131
1
130
1
130
2
129
2
129
:
:
:
:
:
:
129
2
129
2
130
1
130
1
131
0
131
0
Jul 2004
P 38/69 Rev 1.0
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