參數(shù)資料
型號(hào): M34552G8HFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP48
封裝: 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件頁(yè)數(shù): 32/143頁(yè)
文件大?。?/td> 0K
代理商: M34552G8HFP
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13: SWIVELVIEWTM
S1D13505F00A HARDWARE FUNCTIONAL
EPSON
1-115
SPECIFICATION (X23A-A-001-12)
13 SWIVELVIEWTM
13.1 Concept
Computer displays are refreshed in landscape – from left to right and top to bottom; computer
images are stored in the same manner. When a display is used in SwivelViewTM it becomes neces-
sary to rotate the display buffer image by 90
°. The S1D13505 supports SwivelViewTM by rotating
the image 90
° clockwise as it is written to the display buffer. The rotation is done in hardware and is
transparent to the programmer for all display buffer reads and writes.
SwivelViewTM uses a 1024
× 1024 pixel virtual image. The following gures show how the pro-
grammer sees the image and how the image is actually stored in the display buffer. The display is
refreshed in the following sense: C–A–D–B. The application image is written to the S1D13505 in
the following sense: A–B–C–D. The S1D13505 rotates and stores the application image in the fol-
lowing sense: C–A–D–B, the same sense as display refresh.
Figure 13-1 Relationship Between the Screen Image and the Image Residing in the Display Buffer
Note: The image must be written with a 1024 pixel offset between adjacent lines (e.g. 1024 bytes for 8 bpp
mode or 2048 bytes for 16 bpp mode) and a display start address that is non-zero.
1024 pixels
1024
pixels
image seen by programmer
image in display buffer
1024 pixels
portrait
window
W
H
AB
C
D
AB
C
D
H
W
start
address
portrait
window
display
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