參數(shù)資料
型號(hào)： S1D15E06D03B000
廠商： 愛(ài)普生（中國(guó)）有限公司
英文描述： Direct RAM data display by display data RAM
中文描述： RAM數(shù)據(jù)顯示直接由顯示數(shù)據(jù)RAM
文件頁(yè)數(shù)： 17/74頁(yè)
文件大小： 490K
代理商： S1D15E06D03B000
S1D15E06 Series
14
EPSON
Rev. 2.1
Fig. 6.3 4 gray-scale
(D1,D0)
(D3,D2)
(D5,D4)
(D7,D6)
(0,0)
(1,1)
(0,0)
(0,0)
(1,1)
(0,0)
(1,0)
(0,0)
(1,1)
(0,0)
(0,1)
(0,0)
(0,0)
(0,0)
(0,0)
(0,0)
Display data RAM
COM0
COM1
COM2
COM3
LCD
Display data D7 to D0 from the MPU correspond to
LCD common direction, as shown in Fig. 6.3 and 6.4.
Therefore, less restrictions when multi-chip usage.
Furthermore, read/write operations from the MPU to
the RAM are carried out via the input/output buffer.
The read operation from Display data RAM is designed
as an independent operation. Accordingly, even if the
MPU accesses the RAM asynchronously during LCD
display, no adverse effect is given to display.
Fig. 6.4 Binary
6.2.2 Gray-scale display
When the 4 gray-scale is selected by the Display Mode
command, gray-scale is represented by the FRM control
carried out according to the gray-scale data written in
the display data RAM.
Of the 4 gray-scale, 2 gray-scale of halftones (gray-
scale 2 and 1) has its level of contrast specified by the
Gray-scale Set command. Gray-scale can be selected
from 6 levels of contrast.
6.2.3 Page address circuit/column address
circuit
The address of the display data RAM to be accessed is
specified by the Page Address Set command and Column
Address Set command, as shown in Fig. 6.5 and Fig. 6.6.
For Address incremental direction, either the column
direction or page direction can be selected by the Address
Direction command. Whichever direction is chosen,
increment is carried out by positive one (+1) after write
or read operation.
When the column direction is selected for address
increment, the column address is increased by +1 for
every write or read operation. After the column address
has accessed up to 9FH, the page address is incremented
by +1 and the column address shifts to 0H.
When the page direction is selected for address
increment, the page address is increased with the column
address locked in position. When the page address has
accessed up to 32H, the column address is incremented
by +1, and the page address goes to 0H.
Whichever direction is selected for address increment,
the page address goes back to 0H and the column
address to 0H after access up to the column address 9FH
of page address 32H.
As shown in Fig. 6.4, relationship between the display
data RAM column address and segment output can be
reversed by the Column Address Set Direction command.
This will reduce restrictions on IC layout during LCD
module assembling.
D0
D1
D2
D3
D4
0
1
0
0
1
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
0
0
0
0
0
Display data RAM
COM0
COM1
COM2
COM3
COM4
LCD
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